Merge branch 'master' into ref

.github/workflows/checks.yml

@@ -20,11 +20,13 @@ jobs:
         uses: actions/setup-node@v1
         with:
           node-version: 12
-      - name: Install dependencies
-        run: |
-          sudo apt install portaudio19-dev
-          pip install -r requirements.qt
+      - name: Set up Protoc
+        uses: Arduino/actions/setup-protoc@master
       - name: Run checks
         run: |
-          make check
-
+          sudo apt install portaudio19-dev
+          python${{ matrix.python-version }} -m venv ~/pyenv
+          . ~/pyenv/bin/activate
+          pip install -r requirements.qt
+          pip install --upgrade setuptools pip
+          make check RUSTARGS=""

.gitignore

@@ -3,15 +3,18 @@
 *\#
 *~
 .*.swp
-.DS_Store
 .build
 .coverage
+.DS_Store
 .mypy_cache
 .pytype
 __pycache__
 anki/buildhash.py
+anki/backend_pb2.*
 aqt/forms
 locale
+rs/ankirs/src/backend_proto.rs
+rs/target
 tools/runanki.system
 ts/node_modules
 web/deckbrowser.js

.isort.cfg

@@ -1,5 +1,5 @@
 [settings]
-skip=aqt/forms
+skip=aqt/forms,anki/backend_pb2.py,backend_pb2.pyi
 multi_line_output=3
 include_trailing_comma=True
 force_grid_wrap=0

Makefile

@@ -1,13 +1,14 @@
 PREFIX := /usr
 SHELL := bash
 .SHELLFLAGS := -eu -o pipefail -c
-.ONESHELL:
 .DELETE_ON_ERROR:
 MAKEFLAGS += --warn-undefined-variables
 MAKEFLAGS += --no-builtin-rules
 RUNARGS :=
 .SUFFIXES:
-BLACKARGS := -t py36 anki aqt
+BLACKARGS := -t py36 anki aqt tests
+RUSTARGS := --release --strip
+ISORTARGS := anki aqt tests
 
 $(shell mkdir -p .build)
 
@@ -40,6 +41,8 @@ install:
 	-xdg-mime default anki.desktop application/x-apkg
 	@echo
 	@echo "Install complete."
+	# fixme: _ankirs.so needs to be copied into system python env or
+	# 'maturin build' used
 
 uninstall:
 	rm -rf ${DESTDIR}${PREFIX}/share/anki
@@ -55,20 +58,48 @@ uninstall:
 # Prerequisites
 ######################
 
-RUNREQS := .build/pyrunreqs .build/jsreqs
+RUNREQS := .build/py-run-deps .build/ts-deps
 
-.build/pyrunreqs: requirements.txt
+# Python prerequisites
+######################
+
+.build/py-run-deps: requirements.txt
 	pip install -r $<
-	touch $@
+	@touch $@
 
-.build/pycheckreqs: requirements.check .build/pyrunreqs
+.build/py-check-reqs: requirements.check .build/py-run-deps
 	pip install -r $<
 	./tools/typecheck-setup.sh
-	touch $@
+	@touch $@
 
-.build/jsreqs: ts/package.json
+# TS prerequisites
+######################
+
+.build/ts-deps: ts/package.json
 	(cd ts && npm i)
-	touch $@
+	@touch $@
+
+# Rust prerequisites
+######################
+
+.build/rust-deps: .build/py-run-deps
+	pip install maturin
+	@touch $@
+
+RUST_TOOLCHAIN := $(shell cat rs/rust-toolchain)
+
+.build/rs-fmt-deps:
+	rustup component add rustfmt-preview --toolchain $(RUST_TOOLCHAIN)
+	@touch $@
+
+.build/rs-clippy-deps:
+	rustup component add clippy-preview --toolchain $(RUST_TOOLCHAIN)
+	@touch $@
+
+# Protobuf
+######################
+
+PROTODEPS := $(wildcard proto/*.proto)
 
 # Typescript source
 ######################
@@ -76,18 +107,31 @@ RUNREQS := .build/pyrunreqs .build/jsreqs
 TSDEPS := $(wildcard ts/src/*.ts)
 JSDEPS := $(patsubst ts/src/%.ts, web/%.js, $(TSDEPS))
 
+# Rust source
+######################
+
+RSDEPS := $(shell find rs -type f | egrep -v 'target|/\.|proto.rs')
+
 # Building
 ######################
 
-BUILDDEPS := .build/ui .build/js
+BUILDDEPS := .build/ui .build/js .build/rs .build/py-proto
 
 .build/ui: $(RUNREQS) $(shell find designer -type f)
 	./tools/build_ui.sh
-	touch $@
+	@touch $@
 
-.build/js: .build/jsreqs $(TSDEPS)
+.build/js: .build/ts-deps $(TSDEPS)
 	(cd ts && npm run build)
-	touch $@
+	@touch $@
+
+.build/rs: .build/rust-deps $(RUNREQS) $(RSDEPS) $(PROTODEPS)
+	(cd rs/pymod && maturin develop $(RUSTARGS))
+	@touch $@
+
+.build/py-proto: $(RUNREQS) $(PROTODEPS)
+	protoc --proto_path=proto --python_out=anki --mypy_out=anki proto/backend.proto
+	@touch $@
 
 .PHONY: build clean
 
@@ -97,6 +141,7 @@ build: $(BUILDDEPS)
 clean:
 	rm -rf .build
 	rm -rf $(JSDEPS)
+	rm -rf rs/target
 
 # Running
 ######################
@@ -109,61 +154,89 @@ run: build
 ######################
 
 .PHONY: check
-check: mypy pyimports pyfmt pytest pylint checkpretty
+check: rs-test rs-fmt rs-clippy py-mypy py-test py-fmt py-imports py-lint ts-fmt
+
+.PHONY: fix
+fix: fix-py-fmt fix-py-imports fix-rs-fmt fix-ts-fmt
 
 # Checking python
 ######################
 
-PYCHECKDEPS := $(BUILDDEPS) .build/pycheckreqs $(shell find anki aqt -name '*.py' | grep -v buildhash.py)
+PYCHECKDEPS := $(BUILDDEPS) .build/py-check-reqs $(shell find anki aqt -name '*.py' | grep -v buildhash.py)
+PYTESTDEPS := $(wildcard tests/*.py)
 
-.build/mypy: $(PYCHECKDEPS)
+.build/py-mypy: $(PYCHECKDEPS)
 	mypy anki aqt
-	touch $@
+	@touch $@
 
-.build/pytest: $(PYCHECKDEPS) $(wildcard tests/*.py)
+.build/py-test: $(PYCHECKDEPS) $(PYTESTDEPS)
 	./tools/tests.sh
-	touch $@
+	@touch $@
 
-.build/pylint: $(PYCHECKDEPS)
-	pylint -j 0 --rcfile=.pylintrc -f colorized --extension-pkg-whitelist=PyQt5 anki aqt
-	touch $@
+.build/py-lint: $(PYCHECKDEPS)
+	pylint -j 0 --rcfile=.pylintrc -f colorized --extension-pkg-whitelist=PyQt5,_ankirs anki aqt
+	@touch $@
 
-.build/pyimports: $(PYCHECKDEPS)
-	isort anki aqt --check # if this fails, run 'make fixpyimports'
-	touch $@
+.build/py-imports: $(PYCHECKDEPS) $(PYTESTDEPS)
+	isort $(ISORTARGS) --check # if this fails, run 'make fix-py-imports'
+	@touch $@
 
-.build/pyfmt: $(PYCHECKDEPS)
-	black --check $(BLACKARGS) # if this fails, run 'make fixpyfmt'
-	touch $@
+.build/py-fmt: $(PYCHECKDEPS) $(PYTESTDEPS)
+	black --check $(BLACKARGS) # if this fails, run 'make fix-py-fmt'
+	@touch $@
 
-.PHONY: mypy pytest pylint pyimports pyfmt
-mypy: .build/mypy
-pytest: .build/pytest
-pylint: .build/pylint
-pyimports: .build/pyimports
-pyfmt: .build/pyfmt
+.PHONY: py-mypy py-test py-lint py-imports py-fmt
+py-mypy: .build/py-mypy
+py-test: .build/py-test
+py-lint: .build/py-lint
+py-imports: .build/py-imports
+py-fmt: .build/py-fmt
 
-.PHONY: fixpyimports fixpyfmt
+.PHONY: fix-py-imports fix-py-fmt
 
-fixpyimports:
-	isort anki aqt
+fix-py-imports:
+	isort $(ISORTARGS)
 
-fixpyfmt:
+fix-py-fmt:
 	black $(BLACKARGS) anki aqt
 
+# Checking rust
+######################
+
+.build/rs-test: $(RSDEPS)
+	(cd rs/ankirs && cargo test)
+	@touch $@
+
+.build/rs-fmt: .build/rs-fmt-deps $(RSDEPS)
+	(cd rs && cargo fmt -- --check) # if this fails, run 'make fix-rs-fmt'
+	@touch $@
+
+.build/rs-clippy: .build/rs-clippy-deps $(RSDEPS)
+	(cd rs && cargo clippy -- -D warnings)
+	@touch $@
+
+.PHONY: rs-test rs-fmt fix-rs-fmt rs-clippy
+
+rs-test: .build/rs-test
+rs-fmt: .build/rs-fmt
+rs-clippy: .build/rs-clippy
+
+fix-rs-fmt:
+	(cd rs && cargo fmt)
+
+
 # Checking typescript
 ######################
 
 TSCHECKDEPS := $(BUILDDEPS) $(TSDEPS)
 
-.build/checkpretty: $(TSCHECKDEPS)
-	(cd ts && npm run check-pretty) # if this fails, run 'make pretty'
-	touch $@
+.build/ts-fmt: $(TSCHECKDEPS)
+	(cd ts && npm run check-pretty) # if this fails, run 'make fix-ts-fmt'
+	@touch $@
 
-.build/pretty: $(TSCHECKDEPS)
+.PHONY: fix-ts-fmt ts-fmt
+ts-fmt: .build/ts-fmt
+
+fix-ts-fmt:
 	(cd ts && npm run pretty)
-	touch $@
 
-.PHONY: pretty checkpretty
-pretty: .build/pretty
-checkpretty: .build/checkpretty

README.development

@@ -18,6 +18,16 @@ To start, make sure you have the following installed:
  - mpv
  - lame
  - npm
+ - your platform's C compiler, eg gcc, Xcode or Visual Studio 2017.
+ - GNU make
+ - protoc v3 (https://github.com/protocolbuffers/protobuf/releases)
+ - rustup (https://rustup.rs/)
+ - pip 19+
+
+Next, build a Python virtual environment and activate it:
+
+$ python3 -m venv ~/pyenv
+$ . ~/pyenv/bin/activate
 
 If the distro you are using has PyQt5 installed, make sure you have the PyQt5
 WebEngine module and development tools (eg pyqt5-dev-tools) installed as well.
@@ -49,11 +59,11 @@ Mac users
 
 You can use homebrew to install some dependencies:
 
-$ brew install python mpv lame portaudio
+$ brew install python mpv lame portaudio protobuf npm rustup-init
 
 Windows users
 --------------
 
-The build scripts have not been tested on Windows, and you'll find things
-easiest if you build Anki using WSL.
-https://docs.microsoft.com/en-us/windows/wsl/install-win10
+The build process uses a GNU makefile, so you'll either need to run
+GNU make via WSL (https://docs.microsoft.com/en-us/windows/wsl/install-win10)
+or Cygwin, or manually execute the build steps.

anki/backend.py

@@ -0,0 +1,72 @@
+# pylint: skip-file
+
+from typing import Dict, List
+
+import _ankirs  # pytype: disable=import-error
+
+import anki.backend_pb2 as pb
+
+from .types import AllTemplateReqs
+
+
+class BackendException(Exception):
+    def __str__(self) -> str:
+        err: pb.BackendError = self.args[0]  # pylint: disable=unsubscriptable-object
+        kind = err.WhichOneof("value")
+        if kind == "invalid_input":
+            return f"invalid input: {err.invalid_input.info}"
+        elif kind == "template_parse":
+            return f"template parse: {err.template_parse.info}"
+        else:
+            return f"unhandled error: {err}"
+
+
+def proto_template_reqs_to_legacy(
+    reqs: List[pb.TemplateRequirement],
+) -> AllTemplateReqs:
+    legacy_reqs = []
+    for (idx, req) in enumerate(reqs):
+        kind = req.WhichOneof("value")
+        # fixme: sorting is for the unit tests - should check if any
+        # code depends on the order
+        if kind == "any":
+            legacy_reqs.append((idx, "any", sorted(req.any.ords)))
+        elif kind == "all":
+            legacy_reqs.append((idx, "all", sorted(req.all.ords)))
+        else:
+            l: List[int] = []
+            legacy_reqs.append((idx, "none", l))
+    return legacy_reqs
+
+
+class Backend:
+    def __init__(self):
+        self._backend = _ankirs.Backend()
+
+    def _run_command(self, input: pb.BackendInput) -> pb.BackendOutput:
+        input_bytes = input.SerializeToString()
+        output_bytes = self._backend.command(input_bytes)
+        output = pb.BackendOutput()
+        output.ParseFromString(output_bytes)
+        kind = output.WhichOneof("value")
+        if kind == "error":
+            raise BackendException(output.error)
+        else:
+            return output
+
+    def plus_one(self, num: int) -> int:
+        input = pb.BackendInput(plus_one=pb.PlusOneIn(num=num))
+        output = self._run_command(input)
+        return output.plus_one.num
+
+    def template_requirements(
+        self, template_fronts: List[str], field_map: Dict[str, int]
+    ) -> AllTemplateReqs:
+        input = pb.BackendInput(
+            template_requirements=pb.TemplateRequirementsIn(
+                template_front=template_fronts, field_names_to_ordinals=field_map
+            )
+        )
+        output = self._run_command(input).template_requirements
+        reqs: List[pb.TemplateRequirement] = output.requirements  # type: ignore
+        return proto_template_reqs_to_legacy(reqs)

anki/collection.py

@@ -19,6 +19,7 @@ import anki.find
 import anki.latex  # sets up hook
 import anki.notes
 import anki.template
+from anki.backend import Backend
 from anki.cards import Card
 from anki.consts import *
 from anki.db import DB
@@ -84,8 +85,12 @@ class _Collection:
     ls: int
     conf: Dict[str, Any]
     _undo: List[Any]
+    backend: Backend
 
-    def __init__(self, db: DB, server: bool = False, log: bool = False) -> None:
+    def __init__(
+        self, db: DB, backend: Backend, server: bool = False, log: bool = False
+    ) -> None:
+        self.backend = backend
         self._debugLog = log
         self.db = db
         self.path = db._path

anki/decks.py

@@ -8,6 +8,7 @@ import operator
 import unicodedata
 from typing import Any, Dict, List, Optional, Set, Tuple, Union
 
+import anki  # pylint: disable=unused-import
 from anki.consts import *
 from anki.errors import DeckRenameError
 from anki.hooks import runHook
@@ -98,7 +99,7 @@ class DeckManager:
     # Registry save/load
     #############################################################
 
-    def __init__(self, col) -> None:
+    def __init__(self, col: "anki.storage._Collection") -> None:
         self.col = col
         self.decks = {}
         self.dconf = {}

anki/find.py

@@ -608,9 +608,7 @@ def findDupes(col, fieldName, search="") -> List[Tuple[Any, List]]:
         # empty does not count as duplicate
         if not val:
             continue
-        if val not in vals:
-            vals[val] = []
-        vals[val].append(nid)
+        vals.setdefault(val, []).append(nid)
         if len(vals[val]) == 2:
             dupes.append((val, vals[val]))
     return dupes

anki/models.py

@@ -556,6 +556,9 @@ select id from notes where mid = ?)"""
     ##########################################################################
 
     def _updateRequired(self, m: NoteType) -> None:
+        self._updateRequiredNew(m)
+
+    def _updateRequiredLegacy(self, m: NoteType) -> None:
         if m["type"] == MODEL_CLOZE:
             # nothing to do
             return
@@ -566,6 +569,14 @@ select id from notes where mid = ?)"""
             req.append([t["ord"], ret[0], ret[1]])
         m["req"] = req
 
+    def _updateRequiredNew(self, m: NoteType) -> None:
+        fronts = [t["qfmt"] for t in m["tmpls"]]
+        field_map = {}
+        for (idx, fld) in enumerate(m["flds"]):
+            field_map[fld["name"]] = idx
+        reqs = self.col.backend.template_requirements(fronts, field_map)
+        m["req"] = [list(l) for l in reqs]
+
     def _reqForTemplate(
         self, m: NoteType, flds: List[str], t: Template
     ) -> Tuple[Union[str, List[int]], ...]:

anki/notes.py

@@ -4,6 +4,7 @@
 
 from typing import Any, List, Optional, Tuple
 
+import anki  # pylint: disable=unused-import
 from anki.utils import (
     fieldChecksum,
     guid64,
@@ -19,7 +20,10 @@ class Note:
     tags: List[str]
 
     def __init__(
-        self, col, model: Optional[Any] = None, id: Optional[int] = None
+        self,
+        col: "anki.storage._Collection",
+        model: Optional[Any] = None,
+        id: Optional[int] = None,
     ) -> None:
         assert not (model and id)
         self.col = col

anki/storage.py

@@ -8,6 +8,7 @@ import os
 import re
 from typing import Any, Dict, Tuple
 
+from anki.backend import Backend
 from anki.collection import _Collection
 from anki.consts import *
 from anki.db import DB
@@ -26,6 +27,10 @@ def Collection(
     path: str, lock: bool = True, server: bool = False, log: bool = False
 ) -> _Collection:
     "Open a new or existing collection. Path must be unicode."
+    backend = Backend()
+    # fixme: this call is temporarily here to ensure the brige is working
+    # on all platforms, and should be removed in a future beta
+    assert backend.plus_one(5) == 6
     assert path.endswith(".anki2")
     path = os.path.abspath(path)
     create = not os.path.exists(path)
@@ -46,7 +51,7 @@ def Collection(
         db.execute("pragma journal_mode = wal")
     db.setAutocommit(False)
     # add db to col and do any remaining upgrades
-    col = _Collection(db, server, log)
+    col = _Collection(db, backend=backend, server=server, log=log)
     if ver < SCHEMA_VERSION:
         _upgrade(col, ver)
     elif ver > SCHEMA_VERSION:
@@ -60,7 +65,11 @@ def Collection(
         addBasicModel(col)
         col.save()
     if lock:
-        col.lock()
+        try:
+            col.lock()
+        except:
+            col.db.close()
+            raise
     return col
 
 

anki/tags.py

@@ -14,6 +14,7 @@ import json
 import re
 from typing import Callable, Dict, List, Tuple
 
+import anki  # pylint: disable=unused-import
 from anki.hooks import runHook
 from anki.utils import ids2str, intTime
 
@@ -23,7 +24,7 @@ class TagManager:
     # Registry save/load
     #############################################################
 
-    def __init__(self, col) -> None:
+    def __init__(self, col: "anki.storage._Collection") -> None:
         self.col = col
         self.tags: Dict[str, int] = {}
 

anki/template/template.py

@@ -210,14 +210,15 @@ class Template:
                     return "{unknown field %s}" % tag_name
         return txt
 
+    @classmethod
     def clozeText(self, txt: str, ord: str, type: str) -> str:
-        """Processes the given Cloze deletion within the given template."""
+        """Processe the given Cloze deletion within the given template."""
         reg = clozeReg
         currentRegex = clozeReg % ord
         if not re.search(currentRegex, txt):
             # No Cloze deletion was found in txt.
             return ""
-        txt = self._removeFormattingFromMathjax(txt, ord)
+        txt = cls._removeFormattingFromMathjax(txt, ord)
 
         def repl(m):
             # replace chosen cloze with type
@@ -237,7 +238,8 @@ class Template:
         # and display other clozes normally
         return re.sub(reg % r"\d+", "\\2", txt)
 
-    def _removeFormattingFromMathjax(self, txt, ord) -> str:
+    @classmethod
+    def _removeFormattingFromMathjax(cls, txt, ord) -> str:
         """Marks all clozes within MathJax to prevent formatting them.
 
         Active Cloze deletions within MathJax should not be wrapped inside

anki/types.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, Tuple, Union
+from typing import Any, Dict, List, Tuple, Union
 
 # Model attributes are stored in a dict keyed by strings. This type alias
 # provides more descriptive function signatures than just 'Dict[str, Any]'
@@ -31,3 +31,8 @@ QAData = Tuple[
     # Corresponds to 'cardFlags' column. TODO: document
     int,
 ]
+
+TemplateRequirementType = str  # Union["all", "any", "none"]
+# template ordinal, type, list of field ordinals
+TemplateRequiredFieldOrds = Tuple[int, TemplateRequirementType, List[int]]
+AllTemplateReqs = List[TemplateRequiredFieldOrds]

aqt/__init__.py

@@ -332,11 +332,19 @@ def _run(argv=None, exec=True):
     opts, args = parseArgs(argv)
 
     # profile manager
-    pm = ProfileManager(opts.base)
-    pmLoadResult = pm.setupMeta()
+    pm = None
+    try:
+        pm = ProfileManager(opts.base)
+        pmLoadResult = pm.setupMeta()
+    except:
+        # will handle below
+        pass
 
-    # gl workarounds
-    setupGL(pm)
+    if pm:
+        # gl workarounds
+        setupGL(pm)
+        # apply user-provided scale factor
+        os.environ["QT_SCALE_FACTOR"] = str(pm.uiScale())
 
     # opt in to full hidpi support?
     if not os.environ.get("ANKI_NOHIGHDPI"):
@@ -348,9 +356,6 @@ def _run(argv=None, exec=True):
     if os.environ.get("ANKI_SOFTWAREOPENGL"):
         QCoreApplication.setAttribute(Qt.AA_UseSoftwareOpenGL)
 
-    # apply user-provided scale factor
-    os.environ["QT_SCALE_FACTOR"] = str(pm.uiScale())
-
     # create the app
     QCoreApplication.setApplicationName("Anki")
     QGuiApplication.setDesktopFileName("anki.desktop")
@@ -359,6 +364,16 @@ def _run(argv=None, exec=True):
         # we've signaled the primary instance, so we should close
         return
 
+    if not pm:
+        QMessageBox.critical(
+            None,
+            "Error",
+            """\
+Anki could not create its data folder. Please see the File Locations \
+section of the manual, and ensure that location is not read-only.""",
+        )
+        return
+
     # disable icons on mac; this must be done before window created
     if isMac:
         app.setAttribute(Qt.AA_DontShowIconsInMenus)
@@ -392,12 +407,14 @@ environment points to a valid, writable folder.""",
         )
         return
 
+    if pmLoadResult.firstTime:
+        pm.setDefaultLang()
+
     if pmLoadResult.loadError:
         QMessageBox.warning(
             None,
             "Preferences Corrupt",
-            """\
-    Anki's prefs21.db file was corrupt and has been recreated. If you were using multiple \
+            """Anki's prefs21.db file was corrupt and has been recreated. If you were using multiple \
     profiles, please add them back using the same names to recover your cards.""",
         )
 

aqt/about.py

@@ -148,6 +148,7 @@ system. It's free and open source."
             "David Bailey",
             "Arman High",
             "Arthur Milchior",
+            "Rai (Michael Pokorny)",
         )
     )
 

aqt/profiles.py

@@ -97,22 +97,7 @@ class ProfileManager:
     ######################################################################
 
     def ensureBaseExists(self):
-        try:
-            self._ensureExists(self.base)
-        except:
-            # can't translate, as lang not initialized, and qt may not be
-            print("unable to create base folder")
-            QMessageBox.critical(
-                None,
-                "Error",
-                """\
-Anki could not create the folder %s. Please ensure that location is not \
-read-only and you have permission to write to it. If you cannot fix this \
-issue, please see the documentation for information on running Anki from \
-a flash drive."""
-                % self.base,
-            )
-            raise
+        self._ensureExists(self.base)
 
     # Folder migration
     ######################################################################
@@ -385,7 +370,6 @@ create table if not exists profiles
             "insert or replace into profiles values ('_global', ?)",
             self._pickle(metaConf),
         )
-        self._setDefaultLang()
         return result
 
     def _ensureProfile(self):
@@ -409,7 +393,7 @@ please see:
     ######################################################################
     # On first run, allow the user to choose the default language
 
-    def _setDefaultLang(self):
+    def setDefaultLang(self):
         # create dialog
         class NoCloseDiag(QDialog):
             def reject(self):
@@ -452,7 +436,7 @@ please see:
             None, "Anki", en % name, QMessageBox.Yes | QMessageBox.No, QMessageBox.No
         )
         if r != QMessageBox.Yes:
-            return self._setDefaultLang()
+            return self.setDefaultLang()
         self.setLang(code)
 
     def setLang(self, code):

aqt/webview.py

@@ -416,11 +416,16 @@ body {{ zoom: {}; background: {}; {} }}
         self.evalWithCallback("$(document.body).height()", self._onHeight)
 
     def _onHeight(self, qvar):
+        from aqt import mw
+
         if qvar is None:
-            from aqt import mw
 
             mw.progress.timer(1000, mw.reset, False)
             return
 
-        height = math.ceil(qvar * self.zoomFactor())
+        scaleFactor = self.zoomFactor()
+        if scaleFactor == 1:
+            scaleFactor = mw.pm.uiScale()
+
+        height = math.ceil(qvar * scaleFactor)
         self.setFixedHeight(height)

mypy.ini

@@ -34,3 +34,5 @@ ignore_missing_imports = True
 ignore_missing_imports = True
 [mypy-jsonschema.*]
 ignore_missing_imports = True
+[mypy-_ankirs]
+ignore_missing_imports = True

proto/backend.proto

@@ -0,0 +1,68 @@
+syntax = "proto3";
+
+package backend_proto;
+
+message Empty {}
+
+message BackendInput {
+    oneof value {
+        PlusOneIn plus_one = 2;
+        TemplateRequirementsIn template_requirements = 3;
+    }
+}
+
+message BackendOutput {
+    oneof value {
+        BackendError error = 1;
+        PlusOneOut plus_one = 2;
+        TemplateRequirementsOut template_requirements = 3;
+    }
+}
+
+message BackendError {
+    oneof value {
+        InvalidInputError invalid_input = 1;
+        TemplateParseError template_parse = 2;
+    }
+}
+
+message InvalidInputError {
+    string info = 1;
+}
+
+message PlusOneIn {
+    int32 num = 1;
+}
+
+message PlusOneOut {
+    int32 num = 1;
+}
+
+message TemplateParseError {
+    string info = 1;
+}
+
+message TemplateRequirementsIn {
+    repeated string template_front = 1;
+    map<string, uint32> field_names_to_ordinals = 2;
+}
+
+message TemplateRequirementsOut {
+    repeated TemplateRequirement requirements = 1;
+}
+
+message TemplateRequirement {
+    oneof value {
+        TemplateRequirementAll all = 1;
+        TemplateRequirementAny any = 2;
+        Empty none = 3;
+    }
+}
+
+message TemplateRequirementAll {
+    repeated uint32 ords = 1;
+}
+
+message TemplateRequirementAny {
+    repeated uint32 ords = 1;
+}

requirements.check

@@ -1,6 +1,5 @@
-nose
+nose2
 mock
-mypy==0.750
 # fixme: when isort 5.0 is released, switch to pypy
 git+https://github.com/dae/isort#egg=isort
 # fixme: when pylint supports isort 5.0, switch to pypy

requirements.txt

@@ -8,3 +8,7 @@ jsonschema
 psutil; sys_platform == "win32"
 distro; sys_platform != "win32" and sys_platform != "darwin"
 typing
+protobuf
+mypy==0.750
+mypy_protobuf
+

rs/Cargo.lock

@@ -0,0 +1,783 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "aho-corasick"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58fb5e95d83b38284460a5fda7d6470aa0b8844d283a0b614b8535e880800d2d"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "ankirs"
+version = "0.1.0"
+dependencies = [
+ "bytes",
+ "failure",
+ "nom",
+ "prost",
+ "prost-build",
+]
+
+[[package]]
+name = "arrayvec"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd9fd44efafa8690358b7408d253adf110036b88f55672a933f01d616ad9b1b9"
+dependencies = [
+ "nodrop",
+]
+
+[[package]]
+name = "autocfg"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
+
+[[package]]
+name = "backtrace"
+version = "0.3.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "924c76597f0d9ca25d762c25a4d369d51267536465dc5064bdf0eb073ed477ea"
+dependencies = [
+ "backtrace-sys",
+ "cfg-if",
+ "libc",
+ "rustc-demangle",
+]
+
+[[package]]
+name = "backtrace-sys"
+version = "0.1.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d6575f128516de27e3ce99689419835fce9643a9b215a14d2b5b685be018491"
+dependencies = [
+ "cc",
+ "libc",
+]
+
+[[package]]
+name = "byteorder"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
+
+[[package]]
+name = "bytes"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "206fdffcfa2df7cbe15601ef46c813fce0965eb3286db6b56c583b814b51c81c"
+dependencies = [
+ "byteorder",
+ "iovec",
+]
+
+[[package]]
+name = "c2-chacha"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "214238caa1bf3a496ec3392968969cab8549f96ff30652c9e56885329315f6bb"
+dependencies = [
+ "ppv-lite86",
+]
+
+[[package]]
+name = "cc"
+version = "1.0.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f52a465a666ca3d838ebbf08b241383421412fe7ebb463527bba275526d89f76"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+
+[[package]]
+name = "ctor"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd8ce37ad4184ab2ce004c33bf6379185d3b1c95801cab51026bd271bf68eedc"
+dependencies = [
+ "quote 1.0.2",
+ "syn 1.0.11",
+]
+
+[[package]]
+name = "either"
+version = "1.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb1f6b1ce1c140482ea30ddd3335fc0024ac7ee112895426e0a629a6c20adfe3"
+
+[[package]]
+name = "failure"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8273f13c977665c5db7eb2b99ae520952fe5ac831ae4cd09d80c4c7042b5ed9"
+dependencies = [
+ "backtrace",
+ "failure_derive",
+]
+
+[[package]]
+name = "failure_derive"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bc225b78e0391e4b8683440bf2e63c2deeeb2ce5189eab46e2b68c6d3725d08"
+dependencies = [
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "syn 1.0.11",
+ "synstructure",
+]
+
+[[package]]
+name = "fixedbitset"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86d4de0081402f5e88cdac65c8dcdcc73118c1a7a465e2a05f0da05843a8ea33"
+
+[[package]]
+name = "getrandom"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7db7ca94ed4cd01190ceee0d8a8052f08a247aa1b469a7f68c6a3b71afcf407"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "ghost"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a36606a68532b5640dc86bb1f33c64b45c4682aad4c50f3937b317ea387f3d6"
+dependencies = [
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "syn 1.0.11",
+]
+
+[[package]]
+name = "heck"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
+dependencies = [
+ "unicode-segmentation",
+]
+
+[[package]]
+name = "indoc"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9553c1e16c114b8b77ebeb329e5f2876eed62a8d51178c8bc6bff0d65f98f8"
+dependencies = [
+ "indoc-impl",
+ "proc-macro-hack",
+]
+
+[[package]]
+name = "indoc-impl"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b714fc08d0961716390977cdff1536234415ac37b509e34e5a983def8340fb75"
+dependencies = [
+ "proc-macro-hack",
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "syn 1.0.11",
+ "unindent",
+]
+
+[[package]]
+name = "inventory"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4cece20baea71d9f3435e7bbe9adf4765f091c5fe404975f844006964a71299"
+dependencies = [
+ "ctor",
+ "ghost",
+ "inventory-impl",
+]
+
+[[package]]
+name = "inventory-impl"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2869bf972e998977b1cb87e60df70341d48e48dca0823f534feb91ea44adaf9"
+dependencies = [
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "syn 1.0.11",
+]
+
+[[package]]
+name = "iovec"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2b3ea6ff95e175473f8ffe6a7eb7c00d054240321b84c57051175fe3c1e075e"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "itertools"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f56a2d0bc861f9165be4eb3442afd3c236d8a98afd426f65d92324ae1091a484"
+dependencies = [
+ "either",
+]
+
+[[package]]
+name = "itoa"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501266b7edd0174f8530248f87f99c88fbe60ca4ef3dd486835b8d8d53136f7f"
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "lexical-core"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304bccb228c4b020f3a4835d247df0a02a7c4686098d4167762cfbbe4c5cb14"
+dependencies = [
+ "arrayvec",
+ "cfg-if",
+ "rustc_version",
+ "ryu",
+ "static_assertions",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.66"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d515b1f41455adea1313a4a2ac8a8a477634fbae63cc6100e3aebb207ce61558"
+
+[[package]]
+name = "log"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "memchr"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88579771288728879b57485cc7d6b07d648c9f0141eb955f8ab7f9d45394468e"
+
+[[package]]
+name = "multimap"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2eb04b9f127583ed176e163fb9ec6f3e793b87e21deedd5734a69386a18a0151"
+
+[[package]]
+name = "nodrop"
+version = "0.1.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
+
+[[package]]
+name = "nom"
+version = "5.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c618b63422da4401283884e6668d39f819a106ef51f5f59b81add00075da35ca"
+dependencies = [
+ "lexical-core",
+ "memchr",
+ "version_check 0.1.5",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d4c81ffc11c212fa327657cb19dd85eb7419e163b5b076bede2bdb5c974c07e4"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "paste"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "423a519e1c6e828f1e73b720f9d9ed2fa643dce8a7737fb43235ce0b41eeaa49"
+dependencies = [
+ "paste-impl",
+ "proc-macro-hack",
+]
+
+[[package]]
+name = "paste-impl"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4214c9e912ef61bf42b81ba9a47e8aad1b2ffaf739ab162bf96d1e011f54e6c5"
+dependencies = [
+ "proc-macro-hack",
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "syn 1.0.11",
+]
+
+[[package]]
+name = "petgraph"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c3659d1ee90221741f65dd128d9998311b0e40c5d3c23a62445938214abce4f"
+dependencies = [
+ "fixedbitset",
+]
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"
+
+[[package]]
+name = "proc-macro-hack"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ecd45702f76d6d3c75a80564378ae228a85f0b59d2f3ed43c91b4a69eb2ebfc5"
+dependencies = [
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "syn 1.0.11",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "0.4.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
+dependencies = [
+ "unicode-xid 0.1.0",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
+dependencies = [
+ "unicode-xid 0.2.0",
+]
+
+[[package]]
+name = "prost"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96d14b1c185652833d24aaad41c5832b0be5616a590227c1fbff57c616754b23"
+dependencies = [
+ "byteorder",
+ "bytes",
+ "prost-derive",
+]
+
+[[package]]
+name = "prost-build"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb788126ea840817128183f8f603dce02cb7aea25c2a0b764359d8e20010702e"
+dependencies = [
+ "bytes",
+ "heck",
+ "itertools",
+ "log",
+ "multimap",
+ "petgraph",
+ "prost",
+ "prost-types",
+ "tempfile",
+ "which",
+]
+
+[[package]]
+name = "prost-derive"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e7dc378b94ac374644181a2247cebf59a6ec1c88b49ac77f3a94b86b79d0e11"
+dependencies = [
+ "failure",
+ "itertools",
+ "proc-macro2 0.4.30",
+ "quote 0.6.13",
+ "syn 0.15.44",
+]
+
+[[package]]
+name = "prost-types"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1de482a366941c8d56d19b650fac09ca08508f2a696119ee7513ad590c8bac6f"
+dependencies = [
+ "bytes",
+ "prost",
+]
+
+[[package]]
+name = "pymod"
+version = "0.1.0"
+dependencies = [
+ "ankirs",
+ "pyo3",
+]
+
+[[package]]
+name = "pyo3"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f9df1468dddf8a59ec799cf3b930bb75ec09deabe875ba953e06c51d1077136"
+dependencies = [
+ "indoc",
+ "inventory",
+ "lazy_static",
+ "libc",
+ "num-traits",
+ "paste",
+ "pyo3cls",
+ "regex",
+ "serde",
+ "serde_json",
+ "spin",
+ "unindent",
+ "version_check 0.9.1",
+]
+
+[[package]]
+name = "pyo3-derive-backend"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f6e56fb3e97b344a8f87d036f94578399402c6b75949de6270cd07928f790b1"
+dependencies = [
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "syn 1.0.11",
+]
+
+[[package]]
+name = "pyo3cls"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97452dcdf5941627ebc5c06664a07821fc7fc88d7515f02178193a8ebe316468"
+dependencies = [
+ "proc-macro2 1.0.6",
+ "pyo3-derive-backend",
+ "quote 1.0.2",
+ "syn 1.0.11",
+]
+
+[[package]]
+name = "quote"
+version = "0.6.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
+dependencies = [
+ "proc-macro2 0.4.30",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
+dependencies = [
+ "proc-macro2 1.0.6",
+]
+
+[[package]]
+name = "rand"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ae1b169243eaf61759b8475a998f0a385e42042370f3a7dbaf35246eacc8412"
+dependencies = [
+ "getrandom",
+ "libc",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03a2a90da8c7523f554344f921aa97283eadf6ac484a6d2a7d0212fa7f8d6853"
+dependencies = [
+ "c2-chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.1.56"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
+
+[[package]]
+name = "regex"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc220bd33bdce8f093101afe22a037b8eb0e5af33592e6a9caafff0d4cb81cbd"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+ "thread_local",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11a7e20d1cce64ef2fed88b66d347f88bd9babb82845b2b858f3edbf59a4f716"
+
+[[package]]
+name = "remove_dir_all"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "rustc-demangle"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c691c0e608126e00913e33f0ccf3727d5fc84573623b8d65b2df340b5201783"
+
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+dependencies = [
+ "semver",
+]
+
+[[package]]
+name = "ryu"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa8506c1de11c9c4e4c38863ccbe02a305c8188e85a05a784c9e11e1c3910c8"
+
+[[package]]
+name = "semver"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
+[[package]]
+name = "serde"
+version = "1.0.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "414115f25f818d7dfccec8ee535d76949ae78584fc4f79a6f45a904bf8ab4449"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "128f9e303a5a29922045a830221b8f78ec74a5f544944f3d5984f8ec3895ef64"
+dependencies = [
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "syn 1.0.11",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48c575e0cc52bdd09b47f330f646cf59afc586e9c4e3ccd6fc1f625b8ea1dad7"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "spin"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
+
+[[package]]
+name = "static_assertions"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f3eb36b47e512f8f1c9e3d10c2c1965bc992bd9cdb024fa581e2194501c83d3"
+
+[[package]]
+name = "syn"
+version = "0.15.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
+dependencies = [
+ "proc-macro2 0.4.30",
+ "quote 0.6.13",
+ "unicode-xid 0.1.0",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dff0acdb207ae2fe6d5976617f887eb1e35a2ba52c13c7234c790960cdad9238"
+dependencies = [
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "unicode-xid 0.2.0",
+]
+
+[[package]]
+name = "synstructure"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
+dependencies = [
+ "proc-macro2 1.0.6",
+ "quote 1.0.2",
+ "syn 1.0.11",
+ "unicode-xid 0.2.0",
+]
+
+[[package]]
+name = "tempfile"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "rand",
+ "redox_syscall",
+ "remove_dir_all",
+ "winapi",
+]
+
+[[package]]
+name = "thread_local"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
+dependencies = [
+ "lazy_static",
+]
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
+
+[[package]]
+name = "unicode-xid"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+
+[[package]]
+name = "unindent"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63f18aa3b0e35fed5a0048f029558b1518095ffe2a0a31fb87c93dece93a4993"
+
+[[package]]
+name = "version_check"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
+
+[[package]]
+name = "version_check"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
+
+[[package]]
+name = "wasi"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b89c3ce4ce14bdc6fb6beaf9ec7928ca331de5df7e5ea278375642a2f478570d"
+
+[[package]]
+name = "which"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b57acb10231b9493c8472b20cb57317d0679a49e0bdbee44b3b803a6473af164"
+dependencies = [
+ "failure",
+ "libc",
+]
+
+[[package]]
+name = "winapi"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

rs/Cargo.toml

@@ -0,0 +1,6 @@
+[workspace]
+members = ["ankirs", "pymod"]
+
+[profile.release]
+lto = true
+codegen-units = 1

rs/ankirs/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "ankirs"
+version = "0.1.0"
+edition = "2018"
+authors = ["Ankitects Pty Ltd and contributors"]
+
+[dependencies]
+nom = "5.0.1"
+failure = "0.1.6"
+prost = "0.5.0"
+bytes = "0.4"
+
+[build-dependencies]
+prost-build = "0.5.0"

rs/ankirs/build.rs

@@ -0,0 +1,7 @@
+use prost_build;
+
+fn main() {
+    // avoid default OUT_DIR for now, for code completion
+    std::env::set_var("OUT_DIR", "src");
+    prost_build::compile_protos(&["../../proto/backend.proto"], &["../../proto/"]).unwrap();
+}

rs/ankirs/src/backend.rs

@@ -0,0 +1,139 @@
+use crate::backend_proto as pt;
+use crate::backend_proto::backend_input::Value;
+use crate::err::{AnkiError, Result};
+use crate::template::{FieldMap, FieldRequirements, ParsedTemplate};
+use prost::Message;
+use std::collections::HashSet;
+
+pub struct Backend {}
+
+impl Default for Backend {
+    fn default() -> Self {
+        Backend {}
+    }
+}
+
+/// Convert an Anki error to a protobuf error.
+impl std::convert::From<AnkiError> for pt::BackendError {
+    fn from(err: AnkiError) -> Self {
+        use pt::backend_error::Value as V;
+        let value = match err {
+            AnkiError::InvalidInput { info } => V::InvalidInput(pt::InvalidInputError { info }),
+            AnkiError::TemplateParseError { info } => {
+                V::TemplateParse(pt::TemplateParseError { info })
+            }
+        };
+
+        pt::BackendError { value: Some(value) }
+    }
+}
+
+// Convert an Anki error to a protobuf output.
+impl std::convert::From<AnkiError> for pt::backend_output::Value {
+    fn from(err: AnkiError) -> Self {
+        pt::backend_output::Value::Error(err.into())
+    }
+}
+
+impl Backend {
+    pub fn new() -> Backend {
+        Backend::default()
+    }
+
+    /// Decode a request, process it, and return the encoded result.
+    pub fn run_command_bytes(&mut self, req: &[u8]) -> Vec<u8> {
+        let mut buf = vec![];
+
+        let req = match pt::BackendInput::decode(req) {
+            Ok(req) => req,
+            Err(_e) => {
+                // unable to decode
+                let err = AnkiError::invalid_input("couldn't decode backend request");
+                let output = pt::BackendOutput {
+                    value: Some(err.into()),
+                };
+                output.encode(&mut buf).expect("encode failed");
+                return buf;
+            }
+        };
+
+        let resp = self.run_command(req);
+        resp.encode(&mut buf).expect("encode failed");
+        buf
+    }
+
+    fn run_command(&self, input: pt::BackendInput) -> pt::BackendOutput {
+        let oval = if let Some(ival) = input.value {
+            match self.run_command_inner(ival) {
+                Ok(output) => output,
+                Err(err) => err.into(),
+            }
+        } else {
+            AnkiError::invalid_input("unrecognized backend input value").into()
+        };
+
+        pt::BackendOutput { value: Some(oval) }
+    }
+
+    fn run_command_inner(
+        &self,
+        ival: pt::backend_input::Value,
+    ) -> Result<pt::backend_output::Value> {
+        use pt::backend_output::Value as OValue;
+        Ok(match ival {
+            Value::TemplateRequirements(input) => {
+                OValue::TemplateRequirements(self.template_requirements(input)?)
+            }
+            Value::PlusOne(input) => OValue::PlusOne(self.plus_one(input)?),
+        })
+    }
+
+    fn plus_one(&self, input: pt::PlusOneIn) -> Result<pt::PlusOneOut> {
+        let num = input.num + 1;
+        Ok(pt::PlusOneOut { num })
+    }
+
+    fn template_requirements(
+        &self,
+        input: pt::TemplateRequirementsIn,
+    ) -> Result<pt::TemplateRequirementsOut> {
+        let map: FieldMap = input
+            .field_names_to_ordinals
+            .iter()
+            .map(|(name, ord)| (name.as_str(), *ord as u16))
+            .collect();
+        // map each provided template into a requirements list
+        use crate::backend_proto::template_requirement::Value;
+        let all_reqs = input
+            .template_front
+            .into_iter()
+            .map(|template| {
+                if let Ok(tmpl) = ParsedTemplate::from_text(&template) {
+                    // convert the rust structure into a protobuf one
+                    let val = match tmpl.requirements(&map) {
+                        FieldRequirements::Any(ords) => Value::Any(pt::TemplateRequirementAny {
+                            ords: ords_hash_to_set(ords),
+                        }),
+                        FieldRequirements::All(ords) => Value::All(pt::TemplateRequirementAll {
+                            ords: ords_hash_to_set(ords),
+                        }),
+                        FieldRequirements::None => Value::None(pt::Empty {}),
+                    };
+                    Ok(pt::TemplateRequirement { value: Some(val) })
+                } else {
+                    // template parsing failures make card unsatisfiable
+                    Ok(pt::TemplateRequirement {
+                        value: Some(Value::None(pt::Empty {})),
+                    })
+                }
+            })
+            .collect::<Result<Vec<_>>>()?;
+        Ok(pt::TemplateRequirementsOut {
+            requirements: all_reqs,
+        })
+    }
+}
+
+fn ords_hash_to_set(ords: HashSet<u16>) -> Vec<u32> {
+    ords.iter().map(|ord| *ord as u32).collect()
+}

rs/ankirs/src/err.rs

@@ -0,0 +1,23 @@
+pub use failure::{Error, Fail};
+
+pub type Result<T> = std::result::Result<T, AnkiError>;
+
+#[derive(Debug, Fail)]
+pub enum AnkiError {
+    #[fail(display = "invalid input: {}", info)]
+    InvalidInput { info: String },
+
+    #[fail(display = "invalid card template: {}", info)]
+    TemplateParseError { info: String },
+}
+
+// error helpers
+impl AnkiError {
+    pub(crate) fn parse<S: Into<String>>(s: S) -> AnkiError {
+        AnkiError::TemplateParseError { info: s.into() }
+    }
+
+    pub(crate) fn invalid_input<S: Into<String>>(s: S) -> AnkiError {
+        AnkiError::InvalidInput { info: s.into() }
+    }
+}

rs/ankirs/src/lib.rs

@@ -0,0 +1,5 @@
+mod backend_proto;
+
+pub mod backend;
+pub mod err;
+pub mod template;

rs/ankirs/src/template.rs

@@ -0,0 +1,360 @@
+use crate::err::{AnkiError, Result};
+use nom;
+use nom::branch::alt;
+use nom::bytes::complete::tag;
+use nom::error::ErrorKind;
+use nom::sequence::delimited;
+use std::collections::{HashMap, HashSet};
+
+pub type FieldMap<'a> = HashMap<&'a str, u16>;
+
+// Lexing
+//----------------------------------------
+
+#[derive(Debug)]
+pub enum Token<'a> {
+    Text(&'a str),
+    Replacement(&'a str),
+    OpenConditional(&'a str),
+    OpenNegated(&'a str),
+    CloseConditional(&'a str),
+}
+
+/// a span of text, terminated by {{, }} or end of string
+pub(crate) fn text_until_handlebars(s: &str) -> nom::IResult<&str, &str> {
+    let end = s.len();
+
+    let limited_end = end
+        .min(s.find("{{").unwrap_or(end))
+        .min(s.find("}}").unwrap_or(end));
+    let (output, input) = s.split_at(limited_end);
+    if output.is_empty() {
+        Err(nom::Err::Error((input, ErrorKind::TakeUntil)))
+    } else {
+        Ok((input, output))
+    }
+}
+
+/// text outside handlebars
+fn text_token(s: &str) -> nom::IResult<&str, Token> {
+    text_until_handlebars(s).map(|(input, output)| (input, Token::Text(output)))
+}
+
+/// text wrapped in handlebars
+fn handle_token(s: &str) -> nom::IResult<&str, Token> {
+    delimited(tag("{{"), text_until_handlebars, tag("}}"))(s)
+        .map(|(input, output)| (input, classify_handle(output)))
+}
+
+/// classify handle based on leading character
+fn classify_handle(s: &str) -> Token {
+    let start = s.trim();
+    if start.len() < 2 {
+        return Token::Replacement(start);
+    }
+    if start.starts_with('#') {
+        Token::OpenConditional(&start[1..].trim_start())
+    } else if start.starts_with('/') {
+        Token::CloseConditional(&start[1..].trim_start())
+    } else if start.starts_with('^') {
+        Token::OpenNegated(&start[1..].trim_start())
+    } else {
+        Token::Replacement(start)
+    }
+}
+
+fn next_token(input: &str) -> nom::IResult<&str, Token> {
+    alt((handle_token, text_token))(input)
+}
+
+fn tokens(template: &str) -> impl Iterator<Item = Result<Token>> {
+    let mut data = template;
+
+    std::iter::from_fn(move || {
+        if data.is_empty() {
+            return None;
+        }
+        match next_token(data) {
+            Ok((i, o)) => {
+                data = i;
+                Some(Ok(o))
+            }
+            Err(e) => Some(Err(AnkiError::parse(format!("{:?}", e)))),
+        }
+    })
+}
+
+// Parsing
+//----------------------------------------
+
+#[derive(Debug, PartialEq)]
+enum ParsedNode<'a> {
+    Text(&'a str),
+    Replacement {
+        key: &'a str,
+        filters: Vec<&'a str>,
+    },
+    Conditional {
+        key: &'a str,
+        children: Vec<ParsedNode<'a>>,
+    },
+    NegatedConditional {
+        key: &'a str,
+        children: Vec<ParsedNode<'a>>,
+    },
+}
+
+#[derive(Debug)]
+pub struct ParsedTemplate<'a>(Vec<ParsedNode<'a>>);
+
+impl ParsedTemplate<'_> {
+    pub fn from_text(template: &str) -> Result<ParsedTemplate> {
+        let mut iter = tokens(template);
+        Ok(Self(parse_inner(&mut iter, None)?))
+    }
+}
+
+fn parse_inner<'a, I: Iterator<Item = Result<Token<'a>>>>(
+    iter: &mut I,
+    open_tag: Option<&'a str>,
+) -> Result<Vec<ParsedNode<'a>>> {
+    let mut nodes = vec![];
+
+    while let Some(token) = iter.next() {
+        use Token::*;
+        nodes.push(match token? {
+            Text(t) => ParsedNode::Text(t),
+            Replacement(t) => {
+                let mut it = t.rsplit(':');
+                ParsedNode::Replacement {
+                    key: it.next().unwrap(),
+                    filters: it.collect(),
+                }
+            }
+            OpenConditional(t) => ParsedNode::Conditional {
+                key: t,
+                children: parse_inner(iter, Some(t))?,
+            },
+            OpenNegated(t) => ParsedNode::NegatedConditional {
+                key: t,
+                children: parse_inner(iter, Some(t))?,
+            },
+            CloseConditional(t) => {
+                if let Some(open) = open_tag {
+                    if open == t {
+                        // matching closing tag, move back to parent
+                        return Ok(nodes);
+                    }
+                }
+                return Err(AnkiError::parse(format!(
+                    "unbalanced closing tag: {:?} / {}",
+                    open_tag, t
+                )));
+            }
+        });
+    }
+
+    if let Some(open) = open_tag {
+        Err(AnkiError::parse(format!("unclosed conditional {}", open)))
+    } else {
+        Ok(nodes)
+    }
+}
+
+// Checking if template is empty
+//----------------------------------------
+
+impl ParsedTemplate<'_> {
+    /// true if provided fields are sufficient to render the template
+    pub fn renders_with_fields(&self, nonempty_fields: &HashSet<&str>) -> bool {
+        !template_is_empty(nonempty_fields, &self.0)
+    }
+}
+
+fn template_is_empty<'a>(nonempty_fields: &HashSet<&str>, nodes: &[ParsedNode<'a>]) -> bool {
+    use ParsedNode::*;
+    for node in nodes {
+        match node {
+            // ignore normal text
+            Text(_) => (),
+            Replacement { key, filters } => {
+                // Anki doesn't consider a type: reference as a required field
+                if filters.contains(&"type") {
+                    continue;
+                }
+
+                if nonempty_fields.contains(*key) {
+                    // a single replacement is enough
+                    return false;
+                }
+            }
+            Conditional { key, children } => {
+                if !nonempty_fields.contains(*key) {
+                    continue;
+                }
+                if !template_is_empty(nonempty_fields, children) {
+                    return false;
+                }
+            }
+            NegatedConditional { .. } => {
+                // negated conditionals ignored when determining card generation
+                continue;
+            }
+        }
+    }
+
+    true
+}
+
+// Compatibility with old Anki versions
+//----------------------------------------
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum FieldRequirements {
+    Any(HashSet<u16>),
+    All(HashSet<u16>),
+    None,
+}
+
+impl ParsedTemplate<'_> {
+    /// Return fields required by template.
+    ///
+    /// This is not able to represent negated expressions or combinations of
+    /// Any and All, and is provided only for the sake of backwards
+    /// compatibility.
+    pub fn requirements(&self, field_map: &FieldMap) -> FieldRequirements {
+        let mut nonempty: HashSet<_> = Default::default();
+        let mut ords = HashSet::new();
+        for (name, ord) in field_map {
+            nonempty.clear();
+            nonempty.insert(*name);
+            if self.renders_with_fields(&nonempty) {
+                ords.insert(*ord);
+            }
+        }
+        if !ords.is_empty() {
+            return FieldRequirements::Any(ords);
+        }
+
+        nonempty.extend(field_map.keys());
+        ords.extend(field_map.values().copied());
+        for (name, ord) in field_map {
+            // can we remove this field and still render?
+            nonempty.remove(name);
+            if self.renders_with_fields(&nonempty) {
+                ords.remove(ord);
+            }
+            nonempty.insert(*name);
+        }
+        if !ords.is_empty() && self.renders_with_fields(&nonempty) {
+            FieldRequirements::All(ords)
+        } else {
+            FieldRequirements::None
+        }
+    }
+}
+
+// Tests
+//---------------------------------------
+
+#[cfg(test)]
+mod test {
+    use super::{FieldMap, ParsedNode::*, ParsedTemplate as PT};
+    use crate::template::FieldRequirements;
+    use std::collections::HashSet;
+    use std::iter::FromIterator;
+
+    #[test]
+    fn test_parsing() {
+        let tmpl = PT::from_text("foo {{bar}} {{#baz}} quux {{/baz}}").unwrap();
+        assert_eq!(
+            tmpl.0,
+            vec![
+                Text("foo "),
+                Replacement {
+                    key: "bar",
+                    filters: vec![]
+                },
+                Text(" "),
+                Conditional {
+                    key: "baz",
+                    children: vec![Text(" quux ")]
+                }
+            ]
+        );
+
+        let tmpl = PT::from_text("{{^baz}}{{/baz}}").unwrap();
+        assert_eq!(
+            tmpl.0,
+            vec![NegatedConditional {
+                key: "baz",
+                children: vec![]
+            }]
+        );
+
+        PT::from_text("{{#mis}}{{/matched}}").unwrap_err();
+        PT::from_text("{{/matched}}").unwrap_err();
+        PT::from_text("{{#mis}}").unwrap_err();
+
+        // whitespace
+        assert_eq!(
+            PT::from_text("{{ tag }}").unwrap().0,
+            vec![Replacement {
+                key: "tag",
+                filters: vec![]
+            }]
+        );
+    }
+
+    #[test]
+    fn test_nonempty() {
+        let fields = HashSet::from_iter(vec!["1", "3"].into_iter());
+        let mut tmpl = PT::from_text("{{2}}{{1}}").unwrap();
+        assert_eq!(tmpl.renders_with_fields(&fields), true);
+        tmpl = PT::from_text("{{2}}{{type:cloze:1}}").unwrap();
+        assert_eq!(tmpl.renders_with_fields(&fields), false);
+        tmpl = PT::from_text("{{2}}{{4}}").unwrap();
+        assert_eq!(tmpl.renders_with_fields(&fields), false);
+        tmpl = PT::from_text("{{#3}}{{^2}}{{1}}{{/2}}{{/3}}").unwrap();
+        assert_eq!(tmpl.renders_with_fields(&fields), false);
+    }
+
+    #[test]
+    fn test_requirements() {
+        let field_map: FieldMap = vec!["a", "b"]
+            .iter()
+            .enumerate()
+            .map(|(a, b)| (*b, a as u16))
+            .collect();
+
+        let mut tmpl = PT::from_text("{{a}}{{b}}").unwrap();
+        assert_eq!(
+            tmpl.requirements(&field_map),
+            FieldRequirements::Any(HashSet::from_iter(vec![0, 1].into_iter()))
+        );
+
+        tmpl = PT::from_text("{{#a}}{{b}}{{/a}}").unwrap();
+        assert_eq!(
+            tmpl.requirements(&field_map),
+            FieldRequirements::All(HashSet::from_iter(vec![0, 1].into_iter()))
+        );
+
+        tmpl = PT::from_text("{{c}}").unwrap();
+        assert_eq!(tmpl.requirements(&field_map), FieldRequirements::None);
+
+        tmpl = PT::from_text("{{^a}}{{b}}{{/a}}").unwrap();
+        assert_eq!(tmpl.requirements(&field_map), FieldRequirements::None);
+
+        tmpl = PT::from_text("{{#a}}{{#b}}{{a}}{{/b}}{{/a}}").unwrap();
+        assert_eq!(
+            tmpl.requirements(&field_map),
+            FieldRequirements::All(HashSet::from_iter(vec![0, 1].into_iter()))
+        );
+
+        tmpl = PT::from_text("{{a}}{{type:b}}").unwrap();
+        assert_eq!(
+            tmpl.requirements(&field_map),
+            FieldRequirements::Any(HashSet::from_iter(vec![0].into_iter()))
+        );
+    }
+}

rs/pymod/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "pymod"
+version = "0.1.0"
+edition = "2018"
+authors = ["Ankitects Pty Ltd and contributors"]
+
+[dependencies]
+ankirs = { path = "../ankirs" }
+
+[dependencies.pyo3]
+version = "0.8.0"
+features = ["extension-module"]
+
+[lib]
+name = "_ankirs"
+crate-type = ["cdylib"]

rs/pymod/src/lib.rs

@@ -0,0 +1,33 @@
+use ankirs::backend::Backend as RustBackend;
+use pyo3::prelude::*;
+use pyo3::types::PyBytes;
+
+#[pyclass]
+struct Backend {
+    backend: RustBackend,
+}
+
+#[pymethods]
+impl Backend {
+    #[new]
+    fn init(obj: &PyRawObject) {
+        obj.init({
+            Backend {
+                backend: Default::default(),
+            }
+        });
+    }
+
+    fn command(&mut self, py: Python, input: &PyBytes) -> PyResult<PyObject> {
+        let out_bytes = self.backend.run_command_bytes(input.as_bytes());
+        let out_obj = PyBytes::new(py, &out_bytes);
+        Ok(out_obj.into())
+    }
+}
+
+#[pymodule]
+fn _ankirs(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_class::<Backend>()?;
+
+    Ok(())
+}

rs/rust-toolchain

@@ -0,0 +1 @@
+nightly-2019-12-15

rs/rustfmt.toml

@@ -0,0 +1 @@
+ignore = ["backend_proto.rs"]

tests/shared.py

@@ -1,6 +1,10 @@
-import tempfile, os, shutil
+import os
+import shutil
+import tempfile
+
 from anki import Collection as aopen
 
+
 def assertException(exception, func):
     found = False
     try:
@@ -25,6 +29,7 @@ def getEmptyCol():
     col = aopen(nam)
     return col
 
+
 getEmptyCol.master = ""
 
 # Fallback for when the DB needs options passed in.
@@ -34,10 +39,12 @@ def getEmptyDeckWith(**kwargs):
     os.unlink(nam)
     return aopen(nam, **kwargs)
 
+
 def getUpgradeDeckPath(name="anki12.anki"):
     src = os.path.join(testDir, "support", name)
     (fd, dst) = tempfile.mkstemp(suffix=".anki2")
     shutil.copy(src, dst)
     return dst
 
+
 testDir = os.path.dirname(__file__)

tests/test_addons.py

@@ -1,73 +1,57 @@
 import os.path
-from nose.tools import assert_equals
-from mock import MagicMock
 from tempfile import TemporaryDirectory
 from zipfile import ZipFile
 
+from mock import MagicMock
+from nose2.tools.such import helper
+
 from aqt.addons import AddonManager
 
 
 def test_readMinimalManifest():
     assertReadManifest(
-        '{"package": "yes", "name": "no"}',
-        {"package": "yes", "name": "no"}
+        '{"package": "yes", "name": "no"}', {"package": "yes", "name": "no"}
     )
 
 
 def test_readExtraKeys():
     assertReadManifest(
         '{"package": "a", "name": "b", "mod": 3, "conflicts": ["d", "e"]}',
-        {"package": "a", "name": "b", "mod": 3, "conflicts": ["d", "e"]}
+        {"package": "a", "name": "b", "mod": 3, "conflicts": ["d", "e"]},
     )
 
 
 def test_invalidManifest():
-    assertReadManifest(
-        '{"one": 1}',
-        {}
-    )
+    assertReadManifest('{"one": 1}', {})
 
 
 def test_mustHaveName():
-    assertReadManifest(
-        '{"package": "something"}',
-        {}
-    )
+    assertReadManifest('{"package": "something"}', {})
 
 
 def test_mustHavePackage():
-    assertReadManifest(
-        '{"name": "something"}',
-        {}
-    )
+    assertReadManifest('{"name": "something"}', {})
 
 
 def test_invalidJson():
-    assertReadManifest(
-        'this is not a JSON dictionary',
-        {}
-    )
+    assertReadManifest("this is not a JSON dictionary", {})
 
 
 def test_missingManifest():
     assertReadManifest(
-        '{"package": "what", "name": "ever"}',
-        {},
-        nameInZip="not-manifest.bin"
+        '{"package": "what", "name": "ever"}', {}, nameInZip="not-manifest.bin"
     )
 
 
 def test_ignoreExtraKeys():
     assertReadManifest(
-        '{"package": "a", "name": "b", "game": "c"}',
-        {"package": "a", "name": "b"}
+        '{"package": "a", "name": "b", "game": "c"}', {"package": "a", "name": "b"}
     )
 
 
 def test_conflictsMustBeStrings():
     assertReadManifest(
-        '{"package": "a", "name": "b", "conflicts": ["c", 4, {"d": "e"}]}',
-        {}
+        '{"package": "a", "name": "b", "conflicts": ["c", 4, {"d": "e"}]}', {}
     )
 
 
@@ -80,4 +64,4 @@ def assertReadManifest(contents, expectedManifest, nameInZip="manifest.json"):
         adm = AddonManager(MagicMock())
 
         with ZipFile(zfn, "r") as zfile:
-            assert_equals(adm.readManifestFile(zfile), expectedManifest)
+            helper.assertEquals(adm.readManifestFile(zfile), expectedManifest)

tests/test_cards.py

@@ -2,11 +2,12 @@
 
 from tests.shared import getEmptyCol
 
+
 def test_previewCards():
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = '1'
-    f['Back'] = '2'
+    f["Front"] = "1"
+    f["Back"] = "2"
     # non-empty and active
     cards = deck.previewCards(f, 0)
     assert len(cards) == 1
@@ -22,11 +23,12 @@ def test_previewCards():
     # make sure we haven't accidentally added cards to the db
     assert deck.cardCount() == 1
 
+
 def test_delete():
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = '1'
-    f['Back'] = '2'
+    f["Front"] = "1"
+    f["Back"] = "2"
     deck.addNote(f)
     cid = f.cards()[0].id
     deck.reset()
@@ -38,62 +40,65 @@ def test_delete():
     assert deck.db.scalar("select count() from cards") == 0
     assert deck.db.scalar("select count() from graves") == 2
 
+
 def test_misc():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = '1'
-    f['Back'] = '2'
+    f["Front"] = "1"
+    f["Back"] = "2"
     d.addNote(f)
     c = f.cards()[0]
-    id = d.models.current()['id']
-    assert c.template()['ord'] == 0
+    id = d.models.current()["id"]
+    assert c.template()["ord"] == 0
+
 
 def test_genrem():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = '1'
-    f['Back'] = ''
+    f["Front"] = "1"
+    f["Back"] = ""
     d.addNote(f)
     assert len(f.cards()) == 1
     m = d.models.current()
     mm = d.models
     # adding a new template should automatically create cards
     t = mm.newTemplate("rev")
-    t['qfmt'] = '{{Front}}'
-    t['afmt'] = ""
+    t["qfmt"] = "{{Front}}"
+    t["afmt"] = ""
     mm.addTemplate(m, t)
     mm.save(m, templates=True)
     assert len(f.cards()) == 2
     # if the template is changed to remove cards, they'll be removed
-    t['qfmt'] = "{{Back}}"
+    t["qfmt"] = "{{Back}}"
     mm.save(m, templates=True)
     d.remCards(d.emptyCids())
     assert len(f.cards()) == 1
     # if we add to the note, a card should be automatically generated
     f.load()
-    f['Back'] = "1"
+    f["Back"] = "1"
     f.flush()
     assert len(f.cards()) == 2
 
+
 def test_gendeck():
     d = getEmptyCol()
     cloze = d.models.byName("Cloze")
     d.models.setCurrent(cloze)
     f = d.newNote()
-    f['Text'] = '{{c1::one}}'
+    f["Text"] = "{{c1::one}}"
     d.addNote(f)
     assert d.cardCount() == 1
     assert f.cards()[0].did == 1
     # set the model to a new default deck
     newId = d.decks.id("new")
-    cloze['did'] = newId
+    cloze["did"] = newId
     d.models.save(cloze, updateReqs=False)
     # a newly generated card should share the first card's deck
-    f['Text'] += '{{c2::two}}'
+    f["Text"] += "{{c2::two}}"
     f.flush()
     assert f.cards()[1].did == 1
     # and same with multiple cards
-    f['Text'] += '{{c3::three}}'
+    f["Text"] += "{{c3::three}}"
     f.flush()
     assert f.cards()[2].did == 1
     # if one of the cards is in a different deck, it should revert to the
@@ -101,9 +106,6 @@ def test_gendeck():
     c = f.cards()[1]
     c.did = newId
     c.flush()
-    f['Text'] += '{{c4::four}}'
+    f["Text"] += "{{c4::four}}"
     f.flush()
     assert f.cards()[3].did == newId
-
-
-

tests/test_collection.py

@@ -1,16 +1,15 @@
 # coding: utf-8
 
-import os, tempfile
-from tests.shared import assertException, getEmptyCol
-from anki.stdmodels import addBasicModel, models
+import os
+import tempfile
 
 from anki import Collection as aopen
+from anki.stdmodels import addBasicModel, models
+from anki.utils import isWin
+from tests.shared import assertException, getEmptyCol
 
-newPath = None
-newMod = None
 
 def test_create_open():
-    global newPath, newMod
     (fd, path) = tempfile.mkstemp(suffix=".anki2", prefix="test_attachNew")
     try:
         os.close(fd)
@@ -30,27 +29,32 @@ def test_create_open():
     deck.close()
 
     # non-writeable dir
-    assertException(Exception,
-                    lambda: aopen("/attachroot.anki2"))
+    if isWin:
+        dir = "c:\root.anki2"
+    else:
+        dir = "/attachroot.anki2"
+    assertException(Exception, lambda: aopen(dir))
     # reuse tmp file from before, test non-writeable file
     os.chmod(newPath, 0)
-    assertException(Exception,
-                    lambda: aopen(newPath))
+    assertException(Exception, lambda: aopen(newPath))
     os.chmod(newPath, 0o666)
     os.unlink(newPath)
 
+
 def test_noteAddDelete():
     deck = getEmptyCol()
     # add a note
     f = deck.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     n = deck.addNote(f)
     assert n == 1
     # test multiple cards - add another template
-    m = deck.models.current(); mm = deck.models
+    m = deck.models.current()
+    mm = deck.models
     t = mm.newTemplate("Reverse")
-    t['qfmt'] = "{{Back}}"
-    t['afmt'] = "{{Front}}"
+    t["qfmt"] = "{{Back}}"
+    t["afmt"] = "{{Front}}"
     mm.addTemplate(m, t)
     mm.save(m)
     # the default save doesn't generate cards
@@ -61,7 +65,8 @@ def test_noteAddDelete():
     assert deck.cardCount() == 2
     # creating new notes should use both cards
     f = deck.newNote()
-    f['Front'] = "three"; f['Back'] = "four"
+    f["Front"] = "three"
+    f["Back"] = "four"
     n = deck.addNote(f)
     assert n == 2
     assert deck.cardCount() == 4
@@ -72,36 +77,39 @@ def test_noteAddDelete():
     assert not f.dupeOrEmpty()
     # now let's make a duplicate
     f2 = deck.newNote()
-    f2['Front'] = "one"; f2['Back'] = ""
+    f2["Front"] = "one"
+    f2["Back"] = ""
     assert f2.dupeOrEmpty()
     # empty first field should not be permitted either
-    f2['Front'] = " "
+    f2["Front"] = " "
     assert f2.dupeOrEmpty()
 
+
 def test_fieldChecksum():
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = "new"; f['Back'] = "new2"
+    f["Front"] = "new"
+    f["Back"] = "new2"
     deck.addNote(f)
-    assert deck.db.scalar(
-        "select csum from notes") == int("c2a6b03f", 16)
+    assert deck.db.scalar("select csum from notes") == int("c2a6b03f", 16)
     # changing the val should change the checksum
-    f['Front'] = "newx"
+    f["Front"] = "newx"
     f.flush()
-    assert deck.db.scalar(
-        "select csum from notes") == int("302811ae", 16)
+    assert deck.db.scalar("select csum from notes") == int("302811ae", 16)
+
 
 def test_addDelTags():
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = "1"
+    f["Front"] = "1"
     deck.addNote(f)
     f2 = deck.newNote()
-    f2['Front'] = "2"
+    f2["Front"] = "2"
     deck.addNote(f2)
     # adding for a given id
     deck.tags.bulkAdd([f.id], "foo")
-    f.load(); f2.load()
+    f.load()
+    f2.load()
     assert "foo" in f.tags
     assert "foo" not in f2.tags
     # should be canonified
@@ -110,6 +118,7 @@ def test_addDelTags():
     assert f.tags[0] == "aaa"
     assert len(f.tags) == 2
 
+
 def test_timestamps():
     deck = getEmptyCol()
     assert len(deck.models.models) == len(models)
@@ -117,23 +126,24 @@ def test_timestamps():
         addBasicModel(deck)
     assert len(deck.models.models) == 100 + len(models)
 
+
 def test_furigana():
     deck = getEmptyCol()
     mm = deck.models
     m = mm.current()
     # filter should work
-    m['tmpls'][0]['qfmt'] = '{{kana:Front}}'
+    m["tmpls"][0]["qfmt"] = "{{kana:Front}}"
     mm.save(m)
     n = deck.newNote()
-    n['Front'] = 'foo[abc]'
+    n["Front"] = "foo[abc]"
     deck.addNote(n)
     c = n.cards()[0]
     assert c.q().endswith("abc")
     # and should avoid sound
-    n['Front'] = 'foo[sound:abc.mp3]'
+    n["Front"] = "foo[sound:abc.mp3]"
     n.flush()
     assert "sound:" in c.q(reload=True)
     # it shouldn't throw an error while people are editing
-    m['tmpls'][0]['qfmt'] = '{{kana:}}'
+    m["tmpls"][0]["qfmt"] = "{{kana:}}"
     mm.save(m)
     c.q(reload=True)

tests/test_decks.py

@@ -3,6 +3,7 @@
 from anki.errors import DeckRenameError
 from tests.shared import assertException, getEmptyCol
 
+
 def test_basic():
     deck = getEmptyCol()
     # we start with a standard deck
@@ -34,21 +35,22 @@ def test_basic():
     # parents with a different case should be handled correctly
     deck.decks.id("ONE")
     m = deck.models.current()
-    m['did'] = deck.decks.id("one::two")
+    m["did"] = deck.decks.id("one::two")
     deck.models.save(m, updateReqs=False)
     n = deck.newNote()
-    n['Front'] = "abc"
+    n["Front"] = "abc"
     deck.addNote(n)
     # this will error if child and parent case don't match
     deck.sched.deckDueList()
 
+
 def test_remove():
     deck = getEmptyCol()
     # create a new deck, and add a note/card to it
     g1 = deck.decks.id("g1")
     f = deck.newNote()
-    f['Front'] = "1"
-    f.model()['did'] = g1
+    f["Front"] = "1"
+    f.model()["did"] = g1
     deck.addNote(f)
     c = f.cards()[0]
     assert c.did == g1
@@ -62,12 +64,14 @@ def test_remove():
     assert deck.decks.name(c.did) == "[no deck]"
     # let's create another deck and explicitly set the card to it
     g2 = deck.decks.id("g2")
-    c.did = g2; c.flush()
+    c.did = g2
+    c.flush()
     # this time we'll delete the card/note too
     deck.decks.rem(g2, cardsToo=True)
     assert deck.cardCount() == 0
     assert deck.noteCount() == 0
 
+
 def test_rename():
     d = getEmptyCol()
     id = d.decks.id("hello::world")
@@ -80,8 +84,7 @@ def test_rename():
     # create another deck
     id = d.decks.id("tmp")
     # we can't rename it if it conflicts
-    assertException(
-        Exception, lambda: d.decks.rename(d.decks.get(id), "foo"))
+    assertException(Exception, lambda: d.decks.rename(d.decks.get(id), "foo"))
     # when renaming, the children should be renamed too
     d.decks.id("one::two::three")
     id = d.decks.id("one")
@@ -102,62 +105,66 @@ def test_rename():
     assertException(DeckRenameError, lambda: d.decks.rename(child, "PARENT::child"))
 
 
-
 def test_renameForDragAndDrop():
     d = getEmptyCol()
 
     def deckNames():
-        return [ name for name in sorted(d.decks.allNames()) if name != 'Default' ]
+        return [name for name in sorted(d.decks.allNames()) if name != "Default"]
 
-    languages_did = d.decks.id('Languages')
-    chinese_did = d.decks.id('Chinese')
-    hsk_did = d.decks.id('Chinese::HSK')
+    languages_did = d.decks.id("Languages")
+    chinese_did = d.decks.id("Chinese")
+    hsk_did = d.decks.id("Chinese::HSK")
 
     # Renaming also renames children
     d.decks.renameForDragAndDrop(chinese_did, languages_did)
-    assert deckNames() == [ 'Languages', 'Languages::Chinese', 'Languages::Chinese::HSK' ]
+    assert deckNames() == ["Languages", "Languages::Chinese", "Languages::Chinese::HSK"]
 
     # Dragging a deck onto itself is a no-op
     d.decks.renameForDragAndDrop(languages_did, languages_did)
-    assert deckNames() == [ 'Languages', 'Languages::Chinese', 'Languages::Chinese::HSK' ]
+    assert deckNames() == ["Languages", "Languages::Chinese", "Languages::Chinese::HSK"]
 
     # Dragging a deck onto its parent is a no-op
     d.decks.renameForDragAndDrop(hsk_did, chinese_did)
-    assert deckNames() == [ 'Languages', 'Languages::Chinese', 'Languages::Chinese::HSK' ]
+    assert deckNames() == ["Languages", "Languages::Chinese", "Languages::Chinese::HSK"]
 
     # Dragging a deck onto a descendant is a no-op
     d.decks.renameForDragAndDrop(languages_did, hsk_did)
-    assert deckNames() == [ 'Languages', 'Languages::Chinese', 'Languages::Chinese::HSK' ]
+    assert deckNames() == ["Languages", "Languages::Chinese", "Languages::Chinese::HSK"]
 
     # Can drag a grandchild onto its grandparent.  It becomes a child
     d.decks.renameForDragAndDrop(hsk_did, languages_did)
-    assert deckNames() == [ 'Languages', 'Languages::Chinese', 'Languages::HSK' ]
+    assert deckNames() == ["Languages", "Languages::Chinese", "Languages::HSK"]
 
     # Can drag a deck onto its sibling
     d.decks.renameForDragAndDrop(hsk_did, chinese_did)
-    assert deckNames() == [ 'Languages', 'Languages::Chinese', 'Languages::Chinese::HSK' ]
+    assert deckNames() == ["Languages", "Languages::Chinese", "Languages::Chinese::HSK"]
 
     # Can drag a deck back to the top level
     d.decks.renameForDragAndDrop(chinese_did, None)
-    assert deckNames() == [ 'Chinese', 'Chinese::HSK', 'Languages' ]
+    assert deckNames() == ["Chinese", "Chinese::HSK", "Languages"]
 
     # Dragging a top level deck to the top level is a no-op
     d.decks.renameForDragAndDrop(chinese_did, None)
-    assert deckNames() == [ 'Chinese', 'Chinese::HSK', 'Languages' ]
+    assert deckNames() == ["Chinese", "Chinese::HSK", "Languages"]
 
     # can't drack a deck where sibling have same name
     new_hsk_did = d.decks.id("HSK")
-    assertException(DeckRenameError, lambda: d.decks.renameForDragAndDrop(new_hsk_did, chinese_did))
+    assertException(
+        DeckRenameError, lambda: d.decks.renameForDragAndDrop(new_hsk_did, chinese_did)
+    )
     d.decks.rem(new_hsk_did)
 
     # can't drack a deck where sibling have same name different case
     new_hsk_did = d.decks.id("hsk")
-    assertException(DeckRenameError, lambda: d.decks.renameForDragAndDrop(new_hsk_did, chinese_did))
+    assertException(
+        DeckRenameError, lambda: d.decks.renameForDragAndDrop(new_hsk_did, chinese_did)
+    )
     d.decks.rem(new_hsk_did)
 
     # '' is a convenient alias for the top level DID
-    d.decks.renameForDragAndDrop(hsk_did, '')
-    assert deckNames() == [ 'Chinese', 'HSK', 'Languages' ]
+    d.decks.renameForDragAndDrop(hsk_did, "")
+    assert deckNames() == ["Chinese", "HSK", "Languages"]
+
 
 def test_check():
     d = getEmptyCol()

tests/test_exporting.py

@@ -1,37 +1,48 @@
 # coding: utf-8
 
-import nose, os, tempfile
+import os
+import tempfile
+
+from nose2.tools.decorators import with_setup
+
 from anki import Collection as aopen
 from anki.exporting import *
 from anki.importing import Anki2Importer
+
 from .shared import getEmptyCol
 
 deck = None
 ds = None
 testDir = os.path.dirname(__file__)
 
+
 def setup1():
     global deck
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = "foo"; f['Back'] = "bar<br>"; f.tags = ["tag", "tag2"]
+    f["Front"] = "foo"
+    f["Back"] = "bar<br>"
+    f.tags = ["tag", "tag2"]
     deck.addNote(f)
     # with a different deck
     f = deck.newNote()
-    f['Front'] = "baz"; f['Back'] = "qux"
-    f.model()['did'] = deck.decks.id("new deck")
+    f["Front"] = "baz"
+    f["Back"] = "qux"
+    f.model()["did"] = deck.decks.id("new deck")
     deck.addNote(f)
 
+
 ##########################################################################
 
-@nose.with_setup(setup1)
+
+@with_setup(setup1)
 def test_export_anki():
     # create a new deck with its own conf to test conf copying
     did = deck.decks.id("test")
     dobj = deck.decks.get(did)
     confId = deck.decks.confId("newconf")
     conf = deck.decks.getConf(confId)
-    conf['new']['perDay'] = 5
+    conf["new"]["perDay"] = 5
     deck.decks.save(conf)
     deck.decks.setConf(dobj, confId)
     # export
@@ -43,7 +54,7 @@ def test_export_anki():
     e.exportInto(newname)
     # exporting should not have changed conf for original deck
     conf = deck.decks.confForDid(did)
-    assert conf['id'] != 1
+    assert conf["id"] != 1
     # connect to new deck
     d2 = aopen(newname)
     assert d2.cardCount() == 2
@@ -51,10 +62,10 @@ def test_export_anki():
     did = d2.decks.id("test", create=False)
     assert did
     conf2 = d2.decks.confForDid(did)
-    assert conf2['new']['perDay'] == 20
+    assert conf2["new"]["perDay"] == 20
     dobj = d2.decks.get(did)
     # conf should be 1
-    assert dobj['conf'] == 1
+    assert dobj["conf"] == 1
     # try again, limited to a deck
     fd, newname = tempfile.mkstemp(prefix="ankitest", suffix=".anki2")
     newname = str(newname)
@@ -65,13 +76,14 @@ def test_export_anki():
     d2 = aopen(newname)
     assert d2.cardCount() == 1
 
-@nose.with_setup(setup1)
+
+@with_setup(setup1)
 def test_export_ankipkg():
     # add a test file to the media folder
     with open(os.path.join(deck.media.dir(), "今日.mp3"), "w") as f:
         f.write("test")
     n = deck.newNote()
-    n['Front'] = '[sound:今日.mp3]'
+    n["Front"] = "[sound:今日.mp3]"
     deck.addNote(n)
     e = AnkiPackageExporter(deck)
     fd, newname = tempfile.mkstemp(prefix="ankitest", suffix=".apkg")
@@ -80,13 +92,14 @@ def test_export_ankipkg():
     os.unlink(newname)
     e.exportInto(newname)
 
-@nose.with_setup(setup1)
+
+@with_setup(setup1)
 def test_export_anki_due():
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = "foo"
+    f["Front"] = "foo"
     deck.addNote(f)
-    deck.crt -= 86400*10
+    deck.crt -= 86400 * 10
     deck.sched.reset()
     c = deck.sched.getCard()
     deck.sched.answerCard(c, 3)
@@ -112,7 +125,8 @@ def test_export_anki_due():
     deck2.sched.reset()
     assert c.due - deck2.sched.today == 1
 
-# @nose.with_setup(setup1)
+
+# @with_setup(setup1)
 # def test_export_textcard():
 #     e = TextCardExporter(deck)
 #     f = unicode(tempfile.mkstemp(prefix="ankitest")[1])
@@ -121,7 +135,8 @@ def test_export_anki_due():
 #     e.includeTags = True
 #     e.exportInto(f)
 
-@nose.with_setup(setup1)
+
+@with_setup(setup1)
 def test_export_textnote():
     e = TextNoteExporter(deck)
     fd, f = tempfile.mkstemp(prefix="ankitest")
@@ -135,5 +150,6 @@ def test_export_textnote():
     e.exportInto(f)
     assert open(f).readline() == "foo\tbar\n"
 
+
 def test_exporters():
     assert "*.apkg" in str(exporters())

tests/test_find.py

@@ -1,9 +1,10 @@
 # coding: utf-8
-from nose.tools import assert_raises
+from nose2.tools.such import helper
 
 from anki.find import Finder
 from tests.shared import getEmptyCol
 
+
 def test_parse():
     f = Finder(None)
     assert f._tokenize("hello world") == ["hello", "world"]
@@ -12,43 +13,54 @@ def test_parse():
     assert f._tokenize("one --two") == ["one", "-", "two"]
     assert f._tokenize("one - two") == ["one", "-", "two"]
     assert f._tokenize("one or -two") == ["one", "or", "-", "two"]
-    assert f._tokenize("'hello \"world\"'") == ["hello \"world\""]
+    assert f._tokenize("'hello \"world\"'") == ['hello "world"']
     assert f._tokenize('"hello world"') == ["hello world"]
     assert f._tokenize("one (two or ( three or four))") == [
-        "one", "(", "two", "or", "(", "three", "or", "four",
-        ")", ")"]
+        "one",
+        "(",
+        "two",
+        "or",
+        "(",
+        "three",
+        "or",
+        "four",
+        ")",
+        ")",
+    ]
     assert f._tokenize("embedded'string") == ["embedded'string"]
     assert f._tokenize("deck:'two words'") == ["deck:two words"]
 
+
 def test_findCards():
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = 'dog'
-    f['Back'] = 'cat'
+    f["Front"] = "dog"
+    f["Back"] = "cat"
     f.tags.append("monkey animal_1 * %")
     f1id = f.id
     deck.addNote(f)
     firstCardId = f.cards()[0].id
     f = deck.newNote()
-    f['Front'] = 'goats are fun'
-    f['Back'] = 'sheep'
+    f["Front"] = "goats are fun"
+    f["Back"] = "sheep"
     f.tags.append("sheep goat horse animal11")
     deck.addNote(f)
     f2id = f.id
     f = deck.newNote()
-    f['Front'] = 'cat'
-    f['Back'] = 'sheep'
+    f["Front"] = "cat"
+    f["Back"] = "sheep"
     deck.addNote(f)
     catCard = f.cards()[0]
-    m = deck.models.current(); mm = deck.models
+    m = deck.models.current()
+    mm = deck.models
     t = mm.newTemplate("Reverse")
-    t['qfmt'] = "{{Back}}"
-    t['afmt'] = "{{Front}}"
+    t["qfmt"] = "{{Back}}"
+    t["afmt"] = "{{Front}}"
     mm.addTemplate(m, t)
     mm.save(m)
     f = deck.newNote()
-    f['Front'] = 'test'
-    f['Back'] = 'foo bar'
+    f["Front"] = "test"
+    f["Back"] = "foo bar"
     deck.addNote(f)
     latestCardIds = [c.id for c in f.cards()]
     # tag searches
@@ -66,9 +78,7 @@ def test_findCards():
     assert len(deck.findCards("tag:sheep -tag:monkey")) == 1
     assert len(deck.findCards("-tag:sheep")) == 4
     deck.tags.bulkAdd(deck.db.list("select id from notes"), "foo bar")
-    assert (len(deck.findCards("tag:foo")) ==
-            len(deck.findCards("tag:bar")) ==
-            5)
+    assert len(deck.findCards("tag:foo")) == len(deck.findCards("tag:bar")) == 5
     deck.tags.bulkRem(deck.db.list("select id from notes"), "foo")
     assert len(deck.findCards("tag:foo")) == 0
     assert len(deck.findCards("tag:bar")) == 5
@@ -86,7 +96,8 @@ def test_findCards():
     c.flush()
     assert deck.findCards("is:review") == [c.id]
     assert deck.findCards("is:due") == []
-    c.due = 0; c.queue = 2
+    c.due = 0
+    c.queue = 2
     c.flush()
     assert deck.findCards("is:due") == [c.id]
     assert len(deck.findCards("-is:due")) == 4
@@ -97,10 +108,10 @@ def test_findCards():
     assert deck.findCards("is:suspended") == [c.id]
     # nids
     assert deck.findCards("nid:54321") == []
-    assert len(deck.findCards("nid:%d"%f.id)) == 2
+    assert len(deck.findCards("nid:%d" % f.id)) == 2
     assert len(deck.findCards("nid:%d,%d" % (f1id, f2id))) == 2
     # templates
-    with assert_raises(Exception):
+    with helper.assertRaises(Exception):
         deck.findCards("card:foo")
     assert len(deck.findCards("'card:card 1'")) == 4
     assert len(deck.findCards("card:reverse")) == 1
@@ -115,16 +126,16 @@ def test_findCards():
     assert len(deck.findCards("front:do")) == 0
     assert len(deck.findCards("front:*")) == 5
     # ordering
-    deck.conf['sortType'] = "noteCrt"
+    deck.conf["sortType"] = "noteCrt"
     assert deck.findCards("front:*", order=True)[-1] in latestCardIds
     assert deck.findCards("", order=True)[-1] in latestCardIds
-    deck.conf['sortType'] = "noteFld"
+    deck.conf["sortType"] = "noteFld"
     assert deck.findCards("", order=True)[0] == catCard.id
     assert deck.findCards("", order=True)[-1] in latestCardIds
-    deck.conf['sortType'] = "cardMod"
+    deck.conf["sortType"] = "cardMod"
     assert deck.findCards("", order=True)[-1] in latestCardIds
     assert deck.findCards("", order=True)[0] == firstCardId
-    deck.conf['sortBackwards'] = True
+    deck.conf["sortBackwards"] = True
     assert deck.findCards("", order=True)[0] in latestCardIds
     # model
     assert len(deck.findCards("note:basic")) == 5
@@ -136,29 +147,30 @@ def test_findCards():
     assert len(deck.findCards("-deck:foo")) == 5
     assert len(deck.findCards("deck:def*")) == 5
     assert len(deck.findCards("deck:*EFAULT")) == 5
-    with assert_raises(Exception):
+    with helper.assertRaises(Exception):
         deck.findCards("deck:*cefault")
     # full search
     f = deck.newNote()
-    f['Front'] = 'hello<b>world</b>'
-    f['Back'] = 'abc'
+    f["Front"] = "hello<b>world</b>"
+    f["Back"] = "abc"
     deck.addNote(f)
     # as it's the sort field, it matches
     assert len(deck.findCards("helloworld")) == 2
-    #assert len(deck.findCards("helloworld", full=True)) == 2
+    # assert len(deck.findCards("helloworld", full=True)) == 2
     # if we put it on the back, it won't
-    (f['Front'], f['Back']) = (f['Back'], f['Front'])
+    (f["Front"], f["Back"]) = (f["Back"], f["Front"])
     f.flush()
     assert len(deck.findCards("helloworld")) == 0
-    #assert len(deck.findCards("helloworld", full=True)) == 2
-    #assert len(deck.findCards("back:helloworld", full=True)) == 2
+    # assert len(deck.findCards("helloworld", full=True)) == 2
+    # assert len(deck.findCards("back:helloworld", full=True)) == 2
     # searching for an invalid special tag should not error
-    with assert_raises(Exception):
+    with helper.assertRaises(Exception):
         len(deck.findCards("is:invalid"))
     # should be able to limit to parent deck, no children
     id = deck.db.scalar("select id from cards limit 1")
-    deck.db.execute("update cards set did = ? where id = ?",
-                    deck.decks.id("Default::Child"), id)
+    deck.db.execute(
+        "update cards set did = ? where id = ?", deck.decks.id("Default::Child"), id
+    )
     assert len(deck.findCards("deck:default")) == 7
     assert len(deck.findCards("deck:default::child")) == 1
     assert len(deck.findCards("deck:default -deck:default::*")) == 6
@@ -166,7 +178,9 @@ def test_findCards():
     id = deck.db.scalar("select id from cards limit 1")
     deck.db.execute(
         "update cards set queue=2, ivl=10, reps=20, due=30, factor=2200 "
-        "where id = ?", id)
+        "where id = ?",
+        id,
+    )
     assert len(deck.findCards("prop:ivl>5")) == 1
     assert len(deck.findCards("prop:ivl<5")) > 1
     assert len(deck.findCards("prop:ivl>=5")) == 1
@@ -205,8 +219,8 @@ def test_findCards():
     # empty field
     assert len(deck.findCards("front:")) == 0
     f = deck.newNote()
-    f['Front'] = ''
-    f['Back'] = 'abc2'
+    f["Front"] = ""
+    f["Back"] = "abc2"
     assert deck.addNote(f) == 1
     assert len(deck.findCards("front:")) == 1
     # OR searches and nesting
@@ -220,60 +234,67 @@ def test_findCards():
     assert len(deck.findCards("(()")) == 0
     # added
     assert len(deck.findCards("added:0")) == 0
-    deck.db.execute("update cards set id = id - 86400*1000 where id = ?",
-                    id)
+    deck.db.execute("update cards set id = id - 86400*1000 where id = ?", id)
     assert len(deck.findCards("added:1")) == deck.cardCount() - 1
     assert len(deck.findCards("added:2")) == deck.cardCount()
     # flag
-    with assert_raises(Exception):
+    with helper.assertRaises(Exception):
         deck.findCards("flag:01")
-    with assert_raises(Exception):
+    with helper.assertRaises(Exception):
         deck.findCards("flag:12")
 
+
 def test_findReplace():
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = 'foo'
-    f['Back'] = 'bar'
+    f["Front"] = "foo"
+    f["Back"] = "bar"
     deck.addNote(f)
     f2 = deck.newNote()
-    f2['Front'] = 'baz'
-    f2['Back'] = 'foo'
+    f2["Front"] = "baz"
+    f2["Back"] = "foo"
     deck.addNote(f2)
     nids = [f.id, f2.id]
     # should do nothing
     assert deck.findReplace(nids, "abc", "123") == 0
     # global replace
     assert deck.findReplace(nids, "foo", "qux") == 2
-    f.load(); assert f['Front'] == "qux"
-    f2.load(); assert f2['Back'] == "qux"
+    f.load()
+    assert f["Front"] == "qux"
+    f2.load()
+    assert f2["Back"] == "qux"
     # single field replace
     assert deck.findReplace(nids, "qux", "foo", field="Front") == 1
-    f.load(); assert f['Front'] == "foo"
-    f2.load(); assert f2['Back'] == "qux"
+    f.load()
+    assert f["Front"] == "foo"
+    f2.load()
+    assert f2["Back"] == "qux"
     # regex replace
     assert deck.findReplace(nids, "B.r", "reg") == 0
-    f.load(); assert f['Back'] != "reg"
+    f.load()
+    assert f["Back"] != "reg"
     assert deck.findReplace(nids, "B.r", "reg", regex=True) == 1
-    f.load(); assert f['Back'] == "reg"
+    f.load()
+    assert f["Back"] == "reg"
+
 
 def test_findDupes():
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = 'foo'
-    f['Back'] = 'bar'
+    f["Front"] = "foo"
+    f["Back"] = "bar"
     deck.addNote(f)
     f2 = deck.newNote()
-    f2['Front'] = 'baz'
-    f2['Back'] = 'bar'
+    f2["Front"] = "baz"
+    f2["Back"] = "bar"
     deck.addNote(f2)
     f3 = deck.newNote()
-    f3['Front'] = 'quux'
-    f3['Back'] = 'bar'
+    f3["Front"] = "quux"
+    f3["Back"] = "bar"
     deck.addNote(f3)
     f4 = deck.newNote()
-    f4['Front'] = 'quuux'
-    f4['Back'] = 'nope'
+    f4["Front"] = "quuux"
+    f4["Back"] = "nope"
     deck.addNote(f4)
     r = deck.findDupes("Back")
     assert r[0][0] == "bar"

tests/test_flags.py

@@ -1,9 +1,11 @@
 from tests.shared import assertException, getEmptyCol
 
+
 def test_flags():
     col = getEmptyCol()
     n = col.newNote()
-    n['Front'] = "one"; n['Back'] = "two"
+    n["Front"] = "one"
+    n["Back"] = "two"
     cnt = col.addNote(n)
     c = n.cards()[0]
     # make sure higher bits are preserved

tests/test_importing.py

@@ -1,22 +1,29 @@
 # coding: utf-8
 
-import  os
-from tests.shared import  getUpgradeDeckPath, getEmptyCol
+import os
+
+from anki.importing import (
+    Anki2Importer,
+    AnkiPackageImporter,
+    MnemosyneImporter,
+    SupermemoXmlImporter,
+    TextImporter,
+)
 from anki.utils import ids2str
-from anki.importing import Anki2Importer, TextImporter, \
-    SupermemoXmlImporter, MnemosyneImporter, AnkiPackageImporter
+from tests.shared import getEmptyCol, getUpgradeDeckPath
 
 testDir = os.path.dirname(__file__)
 
-srcNotes=None
-srcCards=None
+srcNotes = None
+srcCards = None
+
 
 def test_anki2_mediadupes():
     tmp = getEmptyCol()
     # add a note that references a sound
     n = tmp.newNote()
-    n['Front'] = "[sound:foo.mp3]"
-    mid = n.model()['id']
+    n["Front"] = "[sound:foo.mp3]"
+    mid = n.model()["id"]
     tmp.addNote(n)
     # add that sound to media folder
     with open(os.path.join(tmp.media.dir(), "foo.mp3"), "w") as f:
@@ -41,8 +48,7 @@ def test_anki2_mediadupes():
         f.write("bar")
     imp = Anki2Importer(empty, tmp.path)
     imp.run()
-    assert sorted(os.listdir(empty.media.dir())) == [
-        "foo.mp3", "foo_%s.mp3" % mid]
+    assert sorted(os.listdir(empty.media.dir())) == ["foo.mp3", "foo_%s.mp3" % mid]
     n = empty.getNote(empty.db.scalar("select id from notes"))
     assert "_" in n.fields[0]
     # if the localized media file already exists, we rewrite the note and
@@ -52,25 +58,24 @@ def test_anki2_mediadupes():
         f.write("bar")
     imp = Anki2Importer(empty, tmp.path)
     imp.run()
-    assert sorted(os.listdir(empty.media.dir())) == [
-        "foo.mp3", "foo_%s.mp3" % mid]
-    assert sorted(os.listdir(empty.media.dir())) == [
-        "foo.mp3", "foo_%s.mp3" % mid]
+    assert sorted(os.listdir(empty.media.dir())) == ["foo.mp3", "foo_%s.mp3" % mid]
+    assert sorted(os.listdir(empty.media.dir())) == ["foo.mp3", "foo_%s.mp3" % mid]
     n = empty.getNote(empty.db.scalar("select id from notes"))
     assert "_" in n.fields[0]
 
+
 def test_apkg():
     tmp = getEmptyCol()
     apkg = str(os.path.join(testDir, "support/media.apkg"))
     imp = AnkiPackageImporter(tmp, apkg)
     assert os.listdir(tmp.media.dir()) == []
     imp.run()
-    assert os.listdir(tmp.media.dir()) == ['foo.wav']
+    assert os.listdir(tmp.media.dir()) == ["foo.wav"]
     # importing again should be idempotent in terms of media
     tmp.remCards(tmp.db.list("select id from cards"))
     imp = AnkiPackageImporter(tmp, apkg)
     imp.run()
-    assert os.listdir(tmp.media.dir()) == ['foo.wav']
+    assert os.listdir(tmp.media.dir()) == ["foo.wav"]
     # but if the local file has different data, it will rename
     tmp.remCards(tmp.db.list("select id from cards"))
     with open(os.path.join(tmp.media.dir(), "foo.wav"), "w") as f:
@@ -79,6 +84,7 @@ def test_apkg():
     imp.run()
     assert len(os.listdir(tmp.media.dir())) == 2
 
+
 def test_anki2_diffmodel_templates():
     # different from the above as this one tests only the template text being
     # changed, not the number of cards/fields
@@ -94,11 +100,12 @@ def test_anki2_diffmodel_templates():
     imp.dupeOnSchemaChange = True
     imp.run()
     # collection should contain the note we imported
-    assert(dst.noteCount() == 1)
+    assert dst.noteCount() == 1
     # the front template should contain the text added in the 2nd package
-    tcid = dst.findCards("")[0] # only 1 note in collection
+    tcid = dst.findCards("")[0]  # only 1 note in collection
     tnote = dst.getCard(tcid).note()
-    assert("Changed Front Template" in dst.findTemplates(tnote)[0]['qfmt'])
+    assert "Changed Front Template" in dst.findTemplates(tnote)[0]["qfmt"]
+
 
 def test_anki2_updates():
     # create a new empty deck
@@ -127,6 +134,7 @@ def test_anki2_updates():
     assert dst.noteCount() == 1
     assert dst.db.scalar("select flds from notes").startswith("goodbye")
 
+
 def test_csv():
     deck = getEmptyCol()
     file = str(os.path.join(testDir, "support/text-2fields.txt"))
@@ -147,7 +155,7 @@ def test_csv():
     n.flush()
     i.run()
     n.load()
-    assert n.tags == ['test']
+    assert n.tags == ["test"]
     # if add-only mode, count will be 0
     i.importMode = 1
     i.run()
@@ -161,6 +169,7 @@ def test_csv():
     assert deck.cardCount() == 11
     deck.close()
 
+
 def test_csv2():
     deck = getEmptyCol()
     mm = deck.models
@@ -169,9 +178,9 @@ def test_csv2():
     mm.addField(m, f)
     mm.save(m)
     n = deck.newNote()
-    n['Front'] = "1"
-    n['Back'] = "2"
-    n['Three'] = "3"
+    n["Front"] = "1"
+    n["Back"] = "2"
+    n["Three"] = "3"
     deck.addNote(n)
     # an update with unmapped fields should not clobber those fields
     file = str(os.path.join(testDir, "support/text-update.txt"))
@@ -179,16 +188,17 @@ def test_csv2():
     i.initMapping()
     i.run()
     n.load()
-    assert n['Front'] == "1"
-    assert n['Back'] == "x"
-    assert n['Three'] == "3"
+    assert n["Front"] == "1"
+    assert n["Back"] == "x"
+    assert n["Three"] == "3"
     deck.close()
 
+
 def test_supermemo_xml_01_unicode():
     deck = getEmptyCol()
     file = str(os.path.join(testDir, "support/supermemo1.xml"))
     i = SupermemoXmlImporter(deck, file)
-    #i.META.logToStdOutput = True
+    # i.META.logToStdOutput = True
     i.run()
     assert i.total == 1
     cid = deck.db.scalar("select id from cards")
@@ -198,6 +208,7 @@ def test_supermemo_xml_01_unicode():
     assert c.reps == 7
     deck.close()
 
+
 def test_mnemo():
     deck = getEmptyCol()
     file = str(os.path.join(testDir, "support/mnemo.db"))

tests/test_latex.py

@@ -1,20 +1,21 @@
 # coding: utf-8
 
 import os
-
 import shutil
 
-from tests.shared import  getEmptyCol
 from anki.utils import stripHTML
+from tests.shared import getEmptyCol
+
 
 def test_latex():
     d = getEmptyCol()
     # change latex cmd to simulate broken build
     import anki.latex
+
     anki.latex.pngCommands[0][0] = "nolatex"
     # add a note with latex
     f = d.newNote()
-    f['Front'] = "[latex]hello[/latex]"
+    f["Front"] = "[latex]hello[/latex]"
     d.addNote(f)
     # but since latex couldn't run, there's nothing there
     assert len(os.listdir(d.media.dir())) == 0
@@ -34,13 +35,13 @@ def test_latex():
     assert ".png" in f.cards()[0].q()
     # adding new notes should cause generation on question display
     f = d.newNote()
-    f['Front'] = "[latex]world[/latex]"
+    f["Front"] = "[latex]world[/latex]"
     d.addNote(f)
     f.cards()[0].q()
     assert len(os.listdir(d.media.dir())) == 2
     # another note with the same media should reuse
     f = d.newNote()
-    f['Front'] = " [latex]world[/latex]"
+    f["Front"] = " [latex]world[/latex]"
     d.addNote(f)
     assert len(os.listdir(d.media.dir())) == 2
     oldcard = f.cards()[0]
@@ -49,7 +50,7 @@ def test_latex():
     # missing media will show the latex
     anki.latex.build = False
     f = d.newNote()
-    f['Front'] = "[latex]foo[/latex]"
+    f["Front"] = "[latex]foo[/latex]"
     d.addNote(f)
     assert len(os.listdir(d.media.dir())) == 2
     assert stripHTML(f.cards()[0].q()) == "[latex]foo[/latex]"
@@ -86,10 +87,11 @@ def test_latex():
     (result, msg) = _test_includes_bad_command("\\emph")
     assert not result, msg
 
+
 def _test_includes_bad_command(bad):
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = '[latex]%s[/latex]' % bad
+    f["Front"] = "[latex]%s[/latex]" % bad
     d.addNote(f)
     q = f.cards()[0].q()
     return ("'%s' is not allowed on cards" % bad in q, "Card content: %s" % q)

tests/test_media.py

@@ -1,7 +1,7 @@
 # coding: utf-8
 
-import tempfile
 import os
+import tempfile
 import time
 
 from .shared import getEmptyCol, testDir
@@ -23,6 +23,7 @@ def test_add():
         f.write("world")
     assert d.media.addFile(path) == "foo (1).jpg"
 
+
 def test_strings():
     d = getEmptyCol()
     mf = d.media.filesInStr
@@ -31,12 +32,16 @@ def test_strings():
     assert mf(mid, "aoeu<img src='foo.jpg'>ao") == ["foo.jpg"]
     assert mf(mid, "aoeu<img src='foo.jpg' style='test'>ao") == ["foo.jpg"]
     assert mf(mid, "aoeu<img src='foo.jpg'><img src=\"bar.jpg\">ao") == [
-            "foo.jpg", "bar.jpg"]
+        "foo.jpg",
+        "bar.jpg",
+    ]
     assert mf(mid, "aoeu<img src=foo.jpg style=bar>ao") == ["foo.jpg"]
     assert mf(mid, "<img src=one><img src=two>") == ["one", "two"]
-    assert mf(mid, "aoeu<img src=\"foo.jpg\">ao") == ["foo.jpg"]
-    assert mf(mid, "aoeu<img src=\"foo.jpg\"><img class=yo src=fo>ao") == [
-            "foo.jpg", "fo"]
+    assert mf(mid, 'aoeu<img src="foo.jpg">ao') == ["foo.jpg"]
+    assert mf(mid, 'aoeu<img src="foo.jpg"><img class=yo src=fo>ao') == [
+        "foo.jpg",
+        "fo",
+    ]
     assert mf(mid, "aou[sound:foo.mp3]aou") == ["foo.mp3"]
     sp = d.media.strip
     assert sp("aoeu") == "aoeu"
@@ -47,6 +52,7 @@ def test_strings():
     assert es("<img src='http://foo.com'>") == "<img src='http://foo.com'>"
     assert es('<img src="foo bar.jpg">') == '<img src="foo%20bar.jpg">'
 
+
 def test_deckIntegration():
     d = getEmptyCol()
     # create a media dir
@@ -56,11 +62,13 @@ def test_deckIntegration():
     d.media.addFile(file)
     # add a note which references it
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "<img src='fake.png'>"
+    f["Front"] = "one"
+    f["Back"] = "<img src='fake.png'>"
     d.addNote(f)
     # and one which references a non-existent file
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "<img src='fake2.png'>"
+    f["Front"] = "one"
+    f["Back"] = "<img src='fake2.png'>"
     d.addNote(f)
     # and add another file which isn't used
     with open(os.path.join(d.media.dir(), "foo.jpg"), "w") as f:
@@ -70,12 +78,16 @@ def test_deckIntegration():
     assert ret[0] == ["fake2.png"]
     assert ret[1] == ["foo.jpg"]
 
+
 def test_changes():
     d = getEmptyCol()
+
     def added():
         return d.media.db.execute("select fname from media where csum is not null")
+
     def removed():
         return d.media.db.execute("select fname from media where csum is null")
+
     assert not list(added())
     assert not list(removed())
     # add a file
@@ -97,26 +109,27 @@ def test_changes():
     assert not list(removed())
     # but if we add another file, it will
     time.sleep(1)
-    with open(path+"2", "w") as f:
+    with open(path + "2", "w") as f:
         f.write("yo")
     d.media.findChanges()
     assert len(list(added())) == 2
     assert not list(removed())
     # deletions should get noticed too
     time.sleep(1)
-    os.unlink(path+"2")
+    os.unlink(path + "2")
     d.media.findChanges()
     assert len(list(added())) == 1
     assert len(list(removed())) == 1
 
+
 def test_illegal():
     d = getEmptyCol()
     aString = "a:b|cd\\e/f\0g*h"
     good = "abcdefgh"
     assert d.media.stripIllegal(aString) == good
     for c in aString:
-        bad = d.media.hasIllegal("somestring"+c+"morestring")
+        bad = d.media.hasIllegal("somestring" + c + "morestring")
         if bad:
-            assert(c not in good)
+            assert c not in good
         else:
-            assert(c in good)
+            assert c in good

tests/test_models.py

@@ -1,43 +1,47 @@
 # coding: utf-8
+import time
 
-from tests.shared import getEmptyCol
-from anki.consts import MODEL_CLOZE
-from anki.utils import stripHTML, joinFields
 import anki.template
+from anki.consts import MODEL_CLOZE
+from anki.utils import isWin, joinFields, stripHTML
+from tests.shared import getEmptyCol
+
 
 def test_modelDelete():
     deck = getEmptyCol()
     f = deck.newNote()
-    f['Front'] = '1'
-    f['Back'] = '2'
+    f["Front"] = "1"
+    f["Back"] = "2"
     deck.addNote(f)
     assert deck.cardCount() == 1
     deck.models.rem(deck.models.current())
     assert deck.cardCount() == 0
 
+
 def test_modelCopy():
     deck = getEmptyCol()
     m = deck.models.current()
     m2 = deck.models.copy(m)
-    assert m2['name'] == "Basic copy"
-    assert m2['id'] != m['id']
-    assert len(m2['flds']) == 2
-    assert len(m['flds']) == 2
-    assert len(m2['flds']) == len(m['flds'])
-    assert len(m['tmpls']) == 1
-    assert len(m2['tmpls']) == 1
+    assert m2["name"] == "Basic copy"
+    assert m2["id"] != m["id"]
+    assert len(m2["flds"]) == 2
+    assert len(m["flds"]) == 2
+    assert len(m2["flds"]) == len(m["flds"])
+    assert len(m["tmpls"]) == 1
+    assert len(m2["tmpls"]) == 1
     assert deck.models.scmhash(m) == deck.models.scmhash(m2)
 
+
 def test_fields():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = '1'
-    f['Back'] = '2'
+    f["Front"] = "1"
+    f["Back"] = "2"
     d.addNote(f)
     m = d.models.current()
     # make sure renaming a field updates the templates
-    d.models.renameField(m, m['flds'][0], "NewFront")
-    assert "{{NewFront}}" in m['tmpls'][0]['qfmt']
+    d.models.renameField(m, m["flds"][0], "NewFront")
+    assert "{{NewFront}}" in m["tmpls"][0]["qfmt"]
     h = d.models.scmhash(m)
     # add a field
     f = d.models.newField("foo")
@@ -46,44 +50,46 @@ def test_fields():
     assert d.models.scmhash(m) != h
     # rename it
     d.models.renameField(m, f, "bar")
-    assert d.getNote(d.models.nids(m)[0])['bar'] == ''
+    assert d.getNote(d.models.nids(m)[0])["bar"] == ""
     # delete back
-    d.models.remField(m, m['flds'][1])
+    d.models.remField(m, m["flds"][1])
     assert d.getNote(d.models.nids(m)[0]).fields == ["1", ""]
     # move 0 -> 1
-    d.models.moveField(m, m['flds'][0], 1)
+    d.models.moveField(m, m["flds"][0], 1)
     assert d.getNote(d.models.nids(m)[0]).fields == ["", "1"]
     # move 1 -> 0
-    d.models.moveField(m, m['flds'][1], 0)
+    d.models.moveField(m, m["flds"][1], 0)
     assert d.getNote(d.models.nids(m)[0]).fields == ["1", ""]
     # add another and put in middle
     f = d.models.newField("baz")
     d.models.addField(m, f)
     f = d.getNote(d.models.nids(m)[0])
-    f['baz'] = "2"
+    f["baz"] = "2"
     f.flush()
     assert d.getNote(d.models.nids(m)[0]).fields == ["1", "", "2"]
     # move 2 -> 1
-    d.models.moveField(m, m['flds'][2], 1)
+    d.models.moveField(m, m["flds"][2], 1)
     assert d.getNote(d.models.nids(m)[0]).fields == ["1", "2", ""]
     # move 0 -> 2
-    d.models.moveField(m, m['flds'][0], 2)
+    d.models.moveField(m, m["flds"][0], 2)
     assert d.getNote(d.models.nids(m)[0]).fields == ["2", "", "1"]
     # move 0 -> 1
-    d.models.moveField(m, m['flds'][0], 1)
+    d.models.moveField(m, m["flds"][0], 1)
     assert d.getNote(d.models.nids(m)[0]).fields == ["", "2", "1"]
 
+
 def test_templates():
     d = getEmptyCol()
-    m = d.models.current(); mm = d.models
+    m = d.models.current()
+    mm = d.models
     t = mm.newTemplate("Reverse")
-    t['qfmt'] = "{{Back}}"
-    t['afmt'] = "{{Front}}"
+    t["qfmt"] = "{{Back}}"
+    t["afmt"] = "{{Front}}"
     mm.addTemplate(m, t)
     mm.save(m)
     f = d.newNote()
-    f['Front'] = '1'
-    f['Back'] = '2'
+    f["Front"] = "1"
+    f["Back"] = "2"
     d.addNote(f)
     assert d.cardCount() == 2
     (c, c2) = f.cards()
@@ -92,11 +98,12 @@ def test_templates():
     assert c2.ord == 1
     # switch templates
     d.models.moveTemplate(m, c.template(), 1)
-    c.load(); c2.load()
+    c.load()
+    c2.load()
     assert c.ord == 1
     assert c2.ord == 0
     # removing a template should delete its cards
-    assert d.models.remTemplate(m, m['tmpls'][0])
+    assert d.models.remTemplate(m, m["tmpls"][0])
     assert d.cardCount() == 1
     # and should have updated the other cards' ordinals
     c = f.cards()[0]
@@ -105,64 +112,67 @@ def test_templates():
     # it shouldn't be possible to orphan notes by removing templates
     t = mm.newTemplate("template name")
     mm.addTemplate(m, t)
-    assert not d.models.remTemplate(m, m['tmpls'][0])
+    assert not d.models.remTemplate(m, m["tmpls"][0])
+
 
 def test_cloze_ordinals():
     d = getEmptyCol()
     d.models.setCurrent(d.models.byName("Cloze"))
-    m = d.models.current(); mm = d.models
-    
-    #We replace the default Cloze template
+    m = d.models.current()
+    mm = d.models
+
+    # We replace the default Cloze template
     t = mm.newTemplate("ChainedCloze")
-    t['qfmt'] = "{{text:cloze:Text}}"
-    t['afmt'] = "{{text:cloze:Text}}"
+    t["qfmt"] = "{{text:cloze:Text}}"
+    t["afmt"] = "{{text:cloze:Text}}"
     mm.addTemplate(m, t)
     mm.save(m)
-    d.models.remTemplate(m, m['tmpls'][0])
-    
+    d.models.remTemplate(m, m["tmpls"][0])
+
     f = d.newNote()
-    f['Text'] = '{{c1::firstQ::firstA}}{{c2::secondQ::secondA}}'
+    f["Text"] = "{{c1::firstQ::firstA}}{{c2::secondQ::secondA}}"
     d.addNote(f)
     assert d.cardCount() == 2
     (c, c2) = f.cards()
     # first card should have first ord
     assert c.ord == 0
     assert c2.ord == 1
-    
+
 
 def test_text():
     d = getEmptyCol()
     m = d.models.current()
-    m['tmpls'][0]['qfmt'] = "{{text:Front}}"
+    m["tmpls"][0]["qfmt"] = "{{text:Front}}"
     d.models.save(m)
     f = d.newNote()
-    f['Front'] = 'hello<b>world'
+    f["Front"] = "hello<b>world"
     d.addNote(f)
     assert "helloworld" in f.cards()[0].q()
 
+
 def test_cloze():
     d = getEmptyCol()
     d.models.setCurrent(d.models.byName("Cloze"))
     f = d.newNote()
-    assert f.model()['name'] == "Cloze"
+    assert f.model()["name"] == "Cloze"
     # a cloze model with no clozes is not empty
-    f['Text'] = 'nothing'
+    f["Text"] = "nothing"
     assert d.addNote(f)
     # try with one cloze
     f = d.newNote()
-    f['Text'] = "hello {{c1::world}}"
+    f["Text"] = "hello {{c1::world}}"
     assert d.addNote(f) == 1
     assert "hello <span class=cloze>[...]</span>" in f.cards()[0].q()
     assert "hello <span class=cloze>world</span>" in f.cards()[0].a()
     # and with a comment
     f = d.newNote()
-    f['Text'] = "hello {{c1::world::typical}}"
+    f["Text"] = "hello {{c1::world::typical}}"
     assert d.addNote(f) == 1
     assert "<span class=cloze>[typical]</span>" in f.cards()[0].q()
     assert "<span class=cloze>world</span>" in f.cards()[0].a()
     # and with 2 clozes
     f = d.newNote()
-    f['Text'] = "hello {{c1::world}} {{c2::bar}}"
+    f["Text"] = "hello {{c1::world}} {{c2::bar}}"
     assert d.addNote(f) == 2
     (c1, c2) = f.cards()
     assert "<span class=cloze>[...]</span> bar" in c1.q()
@@ -172,25 +182,27 @@ def test_cloze():
     # if there are multiple answers for a single cloze, they are given in a
     # list
     f = d.newNote()
-    f['Text'] = "a {{c1::b}} {{c1::c}}"
+    f["Text"] = "a {{c1::b}} {{c1::c}}"
     assert d.addNote(f) == 1
-    assert "<span class=cloze>b</span> <span class=cloze>c</span>" in (
-        f.cards()[0].a())
+    assert "<span class=cloze>b</span> <span class=cloze>c</span>" in (f.cards()[0].a())
     # if we add another cloze, a card should be generated
     cnt = d.cardCount()
-    f['Text'] = "{{c2::hello}} {{c1::foo}}"
+    f["Text"] = "{{c2::hello}} {{c1::foo}}"
     f.flush()
     assert d.cardCount() == cnt + 1
     # 0 or negative indices are not supported
-    f['Text'] += "{{c0::zero}} {{c-1:foo}}"
+    f["Text"] += "{{c0::zero}} {{c-1:foo}}"
     f.flush()
     assert len(f.cards()) == 2
 
+
 def test_cloze_mathjax():
     d = getEmptyCol()
     d.models.setCurrent(d.models.byName("Cloze"))
     f = d.newNote()
-    f['Text'] = r'{{c1::ok}} \(2^2\) {{c2::not ok}} \(2^{{c3::2}}\) \(x^3\) {{c4::blah}} {{c5::text with \(x^2\) jax}}'
+    f[
+        "Text"
+    ] = r"{{c1::ok}} \(2^2\) {{c2::not ok}} \(2^{{c3::2}}\) \(x^3\) {{c4::blah}} {{c5::text with \(x^2\) jax}}"
     assert d.addNote(f)
     assert len(f.cards()) == 5
     assert "class=cloze" in f.cards()[0].q()
@@ -200,56 +212,70 @@ def test_cloze_mathjax():
     assert "class=cloze" in f.cards()[4].q()
 
     f = d.newNote()
-    f['Text'] = r'\(a\) {{c1::b}} \[ {{c1::c}} \]'
+    f["Text"] = r"\(a\) {{c1::b}} \[ {{c1::c}} \]"
     assert d.addNote(f)
     assert len(f.cards()) == 1
-    assert f.cards()[0].q().endswith('\(a\) <span class=cloze>[...]</span> \[ [...] \]')
+    assert f.cards()[0].q().endswith("\(a\) <span class=cloze>[...]</span> \[ [...] \]")
 
 
 def test_chained_mods():
     d = getEmptyCol()
     d.models.setCurrent(d.models.byName("Cloze"))
-    m = d.models.current(); mm = d.models
-    
-    #We replace the default Cloze template
+    m = d.models.current()
+    mm = d.models
+
+    # We replace the default Cloze template
     t = mm.newTemplate("ChainedCloze")
-    t['qfmt'] = "{{cloze:text:Text}}"
-    t['afmt'] = "{{cloze:text:Text}}"
+    t["qfmt"] = "{{cloze:text:Text}}"
+    t["afmt"] = "{{cloze:text:Text}}"
     mm.addTemplate(m, t)
     mm.save(m)
-    d.models.remTemplate(m, m['tmpls'][0])
-    
+    d.models.remTemplate(m, m["tmpls"][0])
+
     f = d.newNote()
-    q1 = '<span style=\"color:red\">phrase</span>'
-    a1 = '<b>sentence</b>'
-    q2 = '<span style=\"color:red\">en chaine</span>'
-    a2 = '<i>chained</i>'
-    f['Text'] = "This {{c1::%s::%s}} demonstrates {{c1::%s::%s}} clozes." % (q1,a1,q2,a2)
+    q1 = '<span style="color:red">phrase</span>'
+    a1 = "<b>sentence</b>"
+    q2 = '<span style="color:red">en chaine</span>'
+    a2 = "<i>chained</i>"
+    f["Text"] = "This {{c1::%s::%s}} demonstrates {{c1::%s::%s}} clozes." % (
+        q1,
+        a1,
+        q2,
+        a2,
+    )
     assert d.addNote(f) == 1
-    assert "This <span class=cloze>[sentence]</span> demonstrates <span class=cloze>[chained]</span> clozes." in f.cards()[0].q()
-    assert "This <span class=cloze>phrase</span> demonstrates <span class=cloze>en chaine</span> clozes." in f.cards()[0].a()
+    assert (
+        "This <span class=cloze>[sentence]</span> demonstrates <span class=cloze>[chained]</span> clozes."
+        in f.cards()[0].q()
+    )
+    assert (
+        "This <span class=cloze>phrase</span> demonstrates <span class=cloze>en chaine</span> clozes."
+        in f.cards()[0].a()
+    )
+
 
 def test_modelChange():
     deck = getEmptyCol()
     basic = deck.models.byName("Basic")
     cloze = deck.models.byName("Cloze")
     # enable second template and add a note
-    m = deck.models.current(); mm = deck.models
+    m = deck.models.current()
+    mm = deck.models
     t = mm.newTemplate("Reverse")
-    t['qfmt'] = "{{Back}}"
-    t['afmt'] = "{{Front}}"
+    t["qfmt"] = "{{Back}}"
+    t["afmt"] = "{{Front}}"
     mm.addTemplate(m, t)
     mm.save(m)
     f = deck.newNote()
-    f['Front'] = 'f'
-    f['Back'] = 'b123'
+    f["Front"] = "f"
+    f["Back"] = "b123"
     deck.addNote(f)
     # switch fields
     map = {0: 1, 1: 0}
     deck.models.change(basic, [f.id], basic, map, None)
     f.load()
-    assert f['Front'] == 'b123'
-    assert f['Back'] == 'f'
+    assert f["Front"] == "b123"
+    assert f["Back"] == "f"
     # switch cards
     c0 = f.cards()[0]
     c1 = f.cards()[1]
@@ -258,7 +284,9 @@ def test_modelChange():
     assert c0.ord == 0
     assert c1.ord == 1
     deck.models.change(basic, [f.id], basic, None, map)
-    f.load(); c0.load(); c1.load()
+    f.load()
+    c0.load()
+    c1.load()
     assert "f" in c0.q()
     assert "b123" in c1.q()
     assert c0.ord == 1
@@ -267,6 +295,9 @@ def test_modelChange():
     assert f.cards()[0].id == c1.id
     # delete first card
     map = {0: None, 1: 1}
+    if isWin:
+        # The low precision timer on Windows reveals a race condition
+        time.sleep(0.05)
     deck.models.change(basic, [f.id], basic, None, map)
     f.load()
     c0.load()
@@ -279,30 +310,31 @@ def test_modelChange():
     # but we have two cards, as a new one was generated
     assert len(f.cards()) == 2
     # an unmapped field becomes blank
-    assert f['Front'] == 'b123'
-    assert f['Back'] == 'f'
+    assert f["Front"] == "b123"
+    assert f["Back"] == "f"
     deck.models.change(basic, [f.id], basic, map, None)
     f.load()
-    assert f['Front'] == ''
-    assert f['Back'] == 'f'
+    assert f["Front"] == ""
+    assert f["Back"] == "f"
     # another note to try model conversion
     f = deck.newNote()
-    f['Front'] = 'f2'
-    f['Back'] = 'b2'
+    f["Front"] = "f2"
+    f["Back"] = "b2"
     deck.addNote(f)
     assert deck.models.useCount(basic) == 2
     assert deck.models.useCount(cloze) == 0
     map = {0: 0, 1: 1}
     deck.models.change(basic, [f.id], cloze, map, map)
     f.load()
-    assert f['Text'] == "f2"
+    assert f["Text"] == "f2"
     assert len(f.cards()) == 2
     # back the other way, with deletion of second ord
-    deck.models.remTemplate(basic, basic['tmpls'][1])
+    deck.models.remTemplate(basic, basic["tmpls"][1])
     assert deck.db.scalar("select count() from cards where nid = ?", f.id) == 2
     deck.models.change(cloze, [f.id], basic, map, map)
     assert deck.db.scalar("select count() from cards where nid = ?", f.id) == 1
 
+
 def test_templates():
     d = dict(Foo="x", Bar="y")
     assert anki.template.render("{{Foo}}", d) == "x"
@@ -311,68 +343,83 @@ def test_templates():
     assert anki.template.render("{{#Bar}}{{#Foo}}{{Foo}}{{/Foo}}{{/Bar}}", d) == "x"
     assert anki.template.render("{{#Baz}}{{#Foo}}{{Foo}}{{/Foo}}{{/Baz}}", d) == ""
 
+
 def test_availOrds():
     d = getEmptyCol()
-    m = d.models.current(); mm = d.models
-    t = m['tmpls'][0]
+    m = d.models.current()
+    mm = d.models
+    t = m["tmpls"][0]
     f = d.newNote()
-    f['Front'] = "1"
+    f["Front"] = "1"
     # simple templates
     assert mm.availOrds(m, joinFields(f.fields)) == [0]
-    t['qfmt'] = "{{Back}}"
+    t["qfmt"] = "{{Back}}"
     mm.save(m, templates=True)
     assert not mm.availOrds(m, joinFields(f.fields))
     # AND
-    t['qfmt'] = "{{#Front}}{{#Back}}{{Front}}{{/Back}}{{/Front}}"
+    t["qfmt"] = "{{#Front}}{{#Back}}{{Front}}{{/Back}}{{/Front}}"
     mm.save(m, templates=True)
     assert not mm.availOrds(m, joinFields(f.fields))
-    t['qfmt'] = "{{#Front}}\n{{#Back}}\n{{Front}}\n{{/Back}}\n{{/Front}}"
+    t["qfmt"] = "{{#Front}}\n{{#Back}}\n{{Front}}\n{{/Back}}\n{{/Front}}"
     mm.save(m, templates=True)
     assert not mm.availOrds(m, joinFields(f.fields))
     # OR
-    t['qfmt'] = "{{Front}}\n{{Back}}"
+    t["qfmt"] = "{{Front}}\n{{Back}}"
     mm.save(m, templates=True)
     assert mm.availOrds(m, joinFields(f.fields)) == [0]
-    t['Front'] = ""
-    t['Back'] = "1"
+    t["Front"] = ""
+    t["Back"] = "1"
     assert mm.availOrds(m, joinFields(f.fields)) == [0]
 
+
 def test_req():
     def reqSize(model):
-        if model['type'] == MODEL_CLOZE:
+        if model["type"] == MODEL_CLOZE:
             return
-        assert (len(model['tmpls']) == len(model['req']))
+        assert len(model["tmpls"]) == len(model["req"])
 
     d = getEmptyCol()
     mm = d.models
     basic = mm.byName("Basic")
-    assert 'req' in basic
+    assert "req" in basic
     reqSize(basic)
-    assert basic['req'][0] == [0, 'all', [0]]
+    r = basic["req"][0]
+    assert r[0] == 0
+    assert r[1] in ("any", "all")
+    assert r[2] == [0]
     opt = mm.byName("Basic (optional reversed card)")
     reqSize(opt)
-    assert opt['req'][0] == [0, 'all', [0]]
-    assert opt['req'][1] == [1, 'all', [1, 2]]
-    #testing any
-    opt['tmpls'][1]['qfmt'] = "{{Back}}{{Add Reverse}}"
+    r = opt["req"][0]
+    assert r[1] in ("any", "all")
+    assert r[2] == [0]
+    assert opt["req"][1] == [1, "all", [1, 2]]
+    # testing any
+    opt["tmpls"][1]["qfmt"] = "{{Back}}{{Add Reverse}}"
     mm.save(opt, templates=True)
-    assert opt['req'][1] == [1, 'any', [1, 2]]
-    #testing None
-    opt['tmpls'][1]['qfmt'] = "{{^Add Reverse}}{{Back}}{{/Add Reverse}}"
+    assert opt["req"][1] == [1, "any", [1, 2]]
+    # testing None
+    opt["tmpls"][1]["qfmt"] = "{{^Add Reverse}}{{Back}}{{/Add Reverse}}"
     mm.save(opt, templates=True)
-    assert opt['req'][1] == [1, 'none', []]
+    assert opt["req"][1] == [1, "none", []]
 
-def test_updatereqs_performance():
-    import time
-    d = getEmptyCol()
-    mm = d.models
-    m = mm.byName("Basic")
-    for i in range(100):
-        fld = mm.newField(f"field{i}")
-        mm.addField(m, fld)
-        tmpl = mm.newTemplate(f"template{i}")
-        tmpl['qfmt'] = "{{field%s}}" % i
-        mm.addTemplate(m, tmpl)
-    t = time.time()
-    mm.save(m, templates=True)
-    print("took", (time.time()-t)*100)
+    opt = mm.byName("Basic (type in the answer)")
+    reqSize(opt)
+    r = opt["req"][0]
+    assert r[1] in ("any", "all")
+    assert r[2] == [0]
+
+
+# def test_updatereqs_performance():
+#     import time
+#     d = getEmptyCol()
+#     mm = d.models
+#     m = mm.byName("Basic")
+#     for i in range(100):
+#         fld = mm.newField(f"field{i}")
+#         mm.addField(m, fld)
+#         tmpl = mm.newTemplate(f"template{i}")
+#         tmpl['qfmt'] = "{{field%s}}" % i
+#         mm.addTemplate(m, tmpl)
+#     t = time.time()
+#     mm.save(m, templates=True)
+#     print("took", (time.time()-t)*100)

tests/test_schedv1.py

@@ -1,39 +1,45 @@
 # coding: utf-8
 
-import time
 import copy
+import time
 
 from anki.consts import STARTING_FACTOR
-from tests.shared import getEmptyCol as getEmptyColOrig
-from anki.utils import  intTime
 from anki.hooks import addHook
+from anki.utils import intTime
+from tests.shared import getEmptyCol as getEmptyColOrig
+
 
 def getEmptyCol():
     col = getEmptyColOrig()
     col.changeSchedulerVer(1)
     return col
 
+
 def test_clock():
     d = getEmptyCol()
-    if (d.sched.dayCutoff - intTime()) < 10*60:
+    if (d.sched.dayCutoff - intTime()) < 10 * 60:
         raise Exception("Unit tests will fail around the day rollover.")
 
+
 def checkRevIvl(d, c, targetIvl):
     min, max = d.sched._fuzzIvlRange(targetIvl)
     return min <= c.ivl <= max
 
+
 def test_basics():
     d = getEmptyCol()
     d.reset()
     assert not d.sched.getCard()
 
+
 def test_new():
     d = getEmptyCol()
     d.reset()
     assert d.sched.newCount == 0
     # add a note
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     d.reset()
     assert d.sched.newCount == 1
@@ -71,15 +77,16 @@ def test_new():
     #     assert qs[n] in c.q()
     #     d.sched.answerCard(c, 2)
 
+
 def test_newLimits():
     d = getEmptyCol()
     # add some notes
     g2 = d.decks.id("Default::foo")
     for i in range(30):
         f = d.newNote()
-        f['Front'] = str(i)
+        f["Front"] = str(i)
         if i > 4:
-            f.model()['did'] = g2
+            f.model()["did"] = g2
         d.addNote(f)
     # give the child deck a different configuration
     c2 = d.decks.confId("new conf")
@@ -92,33 +99,36 @@ def test_newLimits():
     assert c.did == 1
     # limit the parent to 10 cards, meaning we get 10 in total
     conf1 = d.decks.confForDid(1)
-    conf1['new']['perDay'] = 10
+    conf1["new"]["perDay"] = 10
     d.reset()
     assert d.sched.newCount == 10
     # if we limit child to 4, we should get 9
     conf2 = d.decks.confForDid(g2)
-    conf2['new']['perDay'] = 4
+    conf2["new"]["perDay"] = 4
     d.reset()
     assert d.sched.newCount == 9
 
+
 def test_newBoxes():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     d.reset()
     c = d.sched.getCard()
-    d.sched._cardConf(c)['new']['delays'] = [1,2,3,4,5]
+    d.sched._cardConf(c)["new"]["delays"] = [1, 2, 3, 4, 5]
     d.sched.answerCard(c, 2)
     # should handle gracefully
-    d.sched._cardConf(c)['new']['delays'] = [1]
+    d.sched._cardConf(c)["new"]["delays"] = [1]
     d.sched.answerCard(c, 2)
 
+
 def test_learn():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     f = d.addNote(f)
     # set as a learn card and rebuild queues
     d.db.execute("update cards set queue=0, type=0")
@@ -126,12 +136,12 @@ def test_learn():
     # sched.getCard should return it, since it's due in the past
     c = d.sched.getCard()
     assert c
-    d.sched._cardConf(c)['new']['delays'] = [0.5, 3, 10]
+    d.sched._cardConf(c)["new"]["delays"] = [0.5, 3, 10]
     # fail it
     d.sched.answerCard(c, 1)
     # it should have three reps left to graduation
-    assert c.left%1000 == 3
-    assert c.left//1000 == 3
+    assert c.left % 1000 == 3
+    assert c.left // 1000 == 3
     # it should by due in 30 seconds
     t = round(c.due - time.time())
     assert t >= 25 and t <= 40
@@ -139,8 +149,8 @@ def test_learn():
     d.sched.answerCard(c, 2)
     # it should by due in 3 minutes
     assert round(c.due - time.time()) in (179, 180)
-    assert c.left%1000 == 2
-    assert c.left//1000 == 2
+    assert c.left % 1000 == 2
+    assert c.left // 1000 == 2
     # check log is accurate
     log = d.db.first("select * from revlog order by id desc")
     assert log[3] == 2
@@ -150,8 +160,8 @@ def test_learn():
     d.sched.answerCard(c, 2)
     # it should by due in 10 minutes
     assert round(c.due - time.time()) in (599, 600)
-    assert c.left%1000 == 1
-    assert c.left//1000 == 1
+    assert c.left % 1000 == 1
+    assert c.left // 1000 == 1
     # the next pass should graduate the card
     assert c.queue == 1
     assert c.type == 1
@@ -159,7 +169,7 @@ def test_learn():
     assert c.queue == 2
     assert c.type == 2
     # should be due tomorrow, with an interval of 1
-    assert c.due == d.sched.today+1
+    assert c.due == d.sched.today + 1
     assert c.ivl == 1
     # or normal removal
     c.type = 0
@@ -188,14 +198,15 @@ def test_learn():
     assert c.queue == 2
     assert c.due == 321
 
+
 def test_learn_collapsed():
     d = getEmptyCol()
     # add 2 notes
     f = d.newNote()
-    f['Front'] = "1"
+    f["Front"] = "1"
     f = d.addNote(f)
     f = d.newNote()
-    f['Front'] = "2"
+    f["Front"] = "2"
     f = d.addNote(f)
     # set as a learn card and rebuild queues
     d.db.execute("update cards set queue=0, type=0")
@@ -214,27 +225,28 @@ def test_learn_collapsed():
     c = d.sched.getCard()
     assert not c.q().endswith("2")
 
+
 def test_learn_day():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     f = d.addNote(f)
     d.sched.reset()
     c = d.sched.getCard()
-    d.sched._cardConf(c)['new']['delays'] = [1, 10, 1440, 2880]
+    d.sched._cardConf(c)["new"]["delays"] = [1, 10, 1440, 2880]
     # pass it
     d.sched.answerCard(c, 2)
     # two reps to graduate, 1 more today
-    assert c.left%1000 == 3
-    assert c.left//1000 == 1
+    assert c.left % 1000 == 3
+    assert c.left // 1000 == 1
     assert d.sched.counts() == (0, 1, 0)
     c = d.sched.getCard()
     ni = d.sched.nextIvl
     assert ni(c, 2) == 86400
     # answering it will place it in queue 3
     d.sched.answerCard(c, 2)
-    assert c.due == d.sched.today+1
+    assert c.due == d.sched.today + 1
     assert c.queue == 3
     assert not d.sched.getCard()
     # for testing, move it back a day
@@ -244,7 +256,7 @@ def test_learn_day():
     assert d.sched.counts() == (0, 1, 0)
     c = d.sched.getCard()
     # nextIvl should work
-    assert ni(c, 2) == 86400*2
+    assert ni(c, 2) == 86400 * 2
     # if we fail it, it should be back in the correct queue
     d.sched.answerCard(c, 1)
     assert c.queue == 1
@@ -266,17 +278,19 @@ def test_learn_day():
     c.flush()
     d.reset()
     assert d.sched.counts() == (0, 0, 1)
-    d.sched._cardConf(c)['lapse']['delays'] = [1440]
+    d.sched._cardConf(c)["lapse"]["delays"] = [1440]
     c = d.sched.getCard()
     d.sched.answerCard(c, 1)
     assert c.queue == 3
     assert d.sched.counts() == (0, 0, 0)
 
+
 def test_reviews():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     # set the card up as a review card, due 8 days ago
     c = f.cards()[0]
@@ -295,7 +309,7 @@ def test_reviews():
     ##################################################
     # different delay to new
     d.reset()
-    d.sched._cardConf(c)['lapse']['delays'] = [2, 20]
+    d.sched._cardConf(c)["lapse"]["delays"] = [2, 20]
     d.sched.answerCard(c, 1)
     assert c.queue == 1
     # it should be due tomorrow, with an interval of 1
@@ -313,7 +327,7 @@ def test_reviews():
     # check ests.
     ni = d.sched.nextIvl
     assert ni(c, 1) == 120
-    assert ni(c, 2) == 20*60
+    assert ni(c, 2) == 20 * 60
     # try again with an ease of 2 instead
     ##################################################
     c = copy.copy(cardcopy)
@@ -355,8 +369,10 @@ def test_reviews():
     c.flush()
     # steup hook
     hooked = []
+
     def onLeech(card):
         hooked.append(1)
+
     addHook("leech", onLeech)
     d.sched.answerCard(c, 1)
     assert hooked
@@ -364,10 +380,11 @@ def test_reviews():
     c.load()
     assert c.queue == -1
 
+
 def test_button_spacing():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     # 1 day ivl review card due now
     c = f.cards()[0]
@@ -384,13 +401,14 @@ def test_button_spacing():
     assert ni(c, 3) == "3 days"
     assert ni(c, 4) == "4 days"
 
+
 def test_overdue_lapse():
     # disabled in commit 3069729776990980f34c25be66410e947e9d51a2
     return
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     # simulate a review that was lapsed and is now due for its normal review
     c = f.cards()[0]
@@ -419,13 +437,15 @@ def test_overdue_lapse():
     d.sched.reset()
     assert d.sched.counts() == (0, 0, 1)
 
+
 def test_finished():
     d = getEmptyCol()
     # nothing due
     assert "Congratulations" in d.sched.finishedMsg()
     assert "limit" not in d.sched.finishedMsg()
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     # have a new card
     assert "new cards available" in d.sched.finishedMsg()
@@ -438,44 +458,46 @@ def test_finished():
     assert "Congratulations" in d.sched.finishedMsg()
     assert "limit" not in d.sched.finishedMsg()
 
+
 def test_nextIvl():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     d.reset()
     conf = d.decks.confForDid(1)
-    conf['new']['delays'] = [0.5, 3, 10]
-    conf['lapse']['delays'] = [1, 5, 9]
+    conf["new"]["delays"] = [0.5, 3, 10]
+    conf["lapse"]["delays"] = [1, 5, 9]
     c = d.sched.getCard()
     # new cards
     ##################################################
     ni = d.sched.nextIvl
     assert ni(c, 1) == 30
     assert ni(c, 2) == 180
-    assert ni(c, 3) == 4*86400
+    assert ni(c, 3) == 4 * 86400
     d.sched.answerCard(c, 1)
     # cards in learning
     ##################################################
     assert ni(c, 1) == 30
     assert ni(c, 2) == 180
-    assert ni(c, 3) == 4*86400
+    assert ni(c, 3) == 4 * 86400
     d.sched.answerCard(c, 2)
     assert ni(c, 1) == 30
     assert ni(c, 2) == 600
-    assert ni(c, 3) == 4*86400
+    assert ni(c, 3) == 4 * 86400
     d.sched.answerCard(c, 2)
     # normal graduation is tomorrow
-    assert ni(c, 2) == 1*86400
-    assert ni(c, 3) == 4*86400
+    assert ni(c, 2) == 1 * 86400
+    assert ni(c, 3) == 4 * 86400
     # lapsed cards
     ##################################################
     c.type = 2
     c.ivl = 100
     c.factor = STARTING_FACTOR
     assert ni(c, 1) == 60
-    assert ni(c, 2) == 100*86400
-    assert ni(c, 3) == 100*86400
+    assert ni(c, 2) == 100 * 86400
+    assert ni(c, 3) == 100 * 86400
     # review cards
     ##################################################
     c.queue = 2
@@ -484,8 +506,8 @@ def test_nextIvl():
     # failing it should put it at 60s
     assert ni(c, 1) == 60
     # or 1 day if relearn is false
-    d.sched._cardConf(c)['lapse']['delays']=[]
-    assert ni(c, 1) == 1*86400
+    d.sched._cardConf(c)["lapse"]["delays"] = []
+    assert ni(c, 1) == 1 * 86400
     # (* 100 1.2 86400)10368000.0
     assert ni(c, 2) == 10368000
     # (* 100 2.5 86400)21600000.0
@@ -494,10 +516,11 @@ def test_nextIvl():
     assert ni(c, 4) == 28080000
     assert d.sched.nextIvlStr(c, 4) == "10.8 months"
 
+
 def test_misc():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     # burying
@@ -508,10 +531,11 @@ def test_misc():
     d.reset()
     assert d.sched.getCard()
 
+
 def test_suspend():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     # suspending
@@ -525,7 +549,11 @@ def test_suspend():
     d.reset()
     assert d.sched.getCard()
     # should cope with rev cards being relearnt
-    c.due = 0; c.ivl = 100; c.type = 2; c.queue = 2; c.flush()
+    c.due = 0
+    c.ivl = 100
+    c.type = 2
+    c.queue = 2
+    c.flush()
     d.reset()
     c = d.sched.getCard()
     d.sched.answerCard(c, 1)
@@ -551,10 +579,11 @@ def test_suspend():
     assert c.due == 1
     assert c.did == 1
 
+
 def test_cram():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     c.ivl = 100
@@ -566,7 +595,7 @@ def test_cram():
     c.startTimer()
     c.flush()
     d.reset()
-    assert d.sched.counts() == (0,0,0)
+    assert d.sched.counts() == (0, 0, 0)
     cardcopy = copy.copy(c)
     # create a dynamic deck and refresh it
     did = d.decks.newDyn("Cram")
@@ -575,18 +604,18 @@ def test_cram():
     # should appear as new in the deck list
     assert sorted(d.sched.deckDueList())[0][4] == 1
     # and should appear in the counts
-    assert d.sched.counts() == (1,0,0)
+    assert d.sched.counts() == (1, 0, 0)
     # grab it and check estimates
     c = d.sched.getCard()
     assert d.sched.answerButtons(c) == 2
     assert d.sched.nextIvl(c, 1) == 600
-    assert d.sched.nextIvl(c, 2) == 138*60*60*24
+    assert d.sched.nextIvl(c, 2) == 138 * 60 * 60 * 24
     cram = d.decks.get(did)
-    cram['delays'] = [1, 10]
+    cram["delays"] = [1, 10]
     assert d.sched.answerButtons(c) == 3
     assert d.sched.nextIvl(c, 1) == 60
     assert d.sched.nextIvl(c, 2) == 600
-    assert d.sched.nextIvl(c, 3) == 138*60*60*24
+    assert d.sched.nextIvl(c, 3) == 138 * 60 * 60 * 24
     d.sched.answerCard(c, 2)
     # elapsed time was 75 days
     # factor = 2.5+1.2/2 = 1.85
@@ -595,12 +624,11 @@ def test_cram():
     assert c.odue == 138
     assert c.queue == 1
     # should be logged as a cram rep
-    assert d.db.scalar(
-        "select type from revlog order by id desc limit 1") == 3
+    assert d.db.scalar("select type from revlog order by id desc limit 1") == 3
     # check ivls again
     assert d.sched.nextIvl(c, 1) == 60
-    assert d.sched.nextIvl(c, 2) == 138*60*60*24
-    assert d.sched.nextIvl(c, 3) == 138*60*60*24
+    assert d.sched.nextIvl(c, 2) == 138 * 60 * 60 * 24
+    assert d.sched.nextIvl(c, 3) == 138 * 60 * 60 * 24
     # when it graduates, due is updated
     c = d.sched.getCard()
     d.sched.answerCard(c, 2)
@@ -616,7 +644,7 @@ def test_cram():
     # check ivls again - passing should be idempotent
     assert d.sched.nextIvl(c, 1) == 60
     assert d.sched.nextIvl(c, 2) == 600
-    assert d.sched.nextIvl(c, 3) == 138*60*60*24
+    assert d.sched.nextIvl(c, 3) == 138 * 60 * 60 * 24
     d.sched.answerCard(c, 2)
     assert c.ivl == 138
     assert c.odue == 138
@@ -630,20 +658,20 @@ def test_cram():
     assert len(d.sched.deckDueList()) == 1
     c.load()
     assert c.ivl == 1
-    assert c.due == d.sched.today+1
+    assert c.due == d.sched.today + 1
     # make it due
     d.reset()
-    assert d.sched.counts() == (0,0,0)
+    assert d.sched.counts() == (0, 0, 0)
     c.due = -5
     c.ivl = 100
     c.flush()
     d.reset()
-    assert d.sched.counts() == (0,0,1)
+    assert d.sched.counts() == (0, 0, 1)
     # cram again
     did = d.decks.newDyn("Cram")
     d.sched.rebuildDyn(did)
     d.reset()
-    assert d.sched.counts() == (0,0,1)
+    assert d.sched.counts() == (0, 0, 1)
     c.load()
     assert d.sched.answerButtons(c) == 4
     # add a sibling so we can test minSpace, etc
@@ -661,10 +689,11 @@ def test_cram():
     # it should have been moved back to the original deck
     assert c.did == 1
 
+
 def test_cram_rem():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     oldDue = f.cards()[0].due
     did = d.decks.newDyn("Cram")
@@ -681,16 +710,17 @@ def test_cram_rem():
     assert c.type == c.queue == 0
     assert c.due == oldDue
 
+
 def test_cram_resched():
     # add card
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     # cram deck
     did = d.decks.newDyn("Cram")
     cram = d.decks.get(did)
-    cram['resched'] = False
+    cram["resched"] = False
     d.sched.rebuildDyn(did)
     d.reset()
     # graduate should return it to new
@@ -786,22 +816,25 @@ def test_cram_resched():
     # d.sched.answerCard(c, 2)
     # print c.__dict__
 
+
 def test_ordcycle():
     d = getEmptyCol()
     # add two more templates and set second active
-    m = d.models.current(); mm = d.models
+    m = d.models.current()
+    mm = d.models
     t = mm.newTemplate("Reverse")
-    t['qfmt'] = "{{Back}}"
-    t['afmt'] = "{{Front}}"
+    t["qfmt"] = "{{Back}}"
+    t["afmt"] = "{{Front}}"
     mm.addTemplate(m, t)
     t = mm.newTemplate("f2")
-    t['qfmt'] = "{{Front}}"
-    t['afmt'] = "{{Back}}"
+    t["qfmt"] = "{{Front}}"
+    t["afmt"] = "{{Back}}"
     mm.addTemplate(m, t)
     mm.save(m)
     # create a new note; it should have 3 cards
     f = d.newNote()
-    f['Front'] = "1"; f['Back'] = "1"
+    f["Front"] = "1"
+    f["Back"] = "1"
     d.addNote(f)
     assert d.cardCount() == 3
     d.reset()
@@ -810,10 +843,12 @@ def test_ordcycle():
     assert d.sched.getCard().ord == 1
     assert d.sched.getCard().ord == 2
 
+
 def test_counts_idx():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     d.reset()
     assert d.sched.counts() == (1, 0, 0)
@@ -832,10 +867,11 @@ def test_counts_idx():
     d.sched.answerCard(c, 1)
     assert d.sched.counts() == (0, 2, 0)
 
+
 def test_repCounts():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     d.reset()
     # lrnReps should be accurate on pass/fail
@@ -853,7 +889,7 @@ def test_repCounts():
     d.sched.answerCard(d.sched.getCard(), 2)
     assert d.sched.counts() == (0, 0, 0)
     f = d.newNote()
-    f['Front'] = "two"
+    f["Front"] = "two"
     d.addNote(f)
     d.reset()
     # initial pass should be correct too
@@ -865,14 +901,14 @@ def test_repCounts():
     assert d.sched.counts() == (0, 0, 0)
     # immediate graduate should work
     f = d.newNote()
-    f['Front'] = "three"
+    f["Front"] = "three"
     d.addNote(f)
     d.reset()
     d.sched.answerCard(d.sched.getCard(), 3)
     assert d.sched.counts() == (0, 0, 0)
     # and failing a review should too
     f = d.newNote()
-    f['Front'] = "three"
+    f["Front"] = "three"
     d.addNote(f)
     c = f.cards()[0]
     c.type = 2
@@ -884,12 +920,13 @@ def test_repCounts():
     d.sched.answerCard(d.sched.getCard(), 1)
     assert d.sched.counts() == (0, 1, 0)
 
+
 def test_timing():
     d = getEmptyCol()
     # add a few review cards, due today
     for i in range(5):
         f = d.newNote()
-        f['Front'] = "num"+str(i)
+        f["Front"] = "num" + str(i)
         d.addNote(f)
         c = f.cards()[0]
         c.type = 2
@@ -900,7 +937,7 @@ def test_timing():
     d.reset()
     c = d.sched.getCard()
     # set a a fail delay of 1 second so we don't have to wait
-    d.sched._cardConf(c)['lapse']['delays'][0] = 1/60.0
+    d.sched._cardConf(c)["lapse"]["delays"][0] = 1 / 60.0
     d.sched.answerCard(c, 1)
     # the next card should be another review
     c = d.sched.getCard()
@@ -910,11 +947,12 @@ def test_timing():
     c = d.sched.getCard()
     assert c.queue == 1
 
+
 def test_collapse():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     d.reset()
     # test collapsing
@@ -924,16 +962,17 @@ def test_collapse():
     d.sched.answerCard(c, 3)
     assert not d.sched.getCard()
 
+
 def test_deckDue():
     d = getEmptyCol()
     # add a note with default deck
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     # and one that's a child
     f = d.newNote()
-    f['Front'] = "two"
-    default1 = f.model()['did'] = d.decks.id("Default::1")
+    f["Front"] = "two"
+    default1 = f.model()["did"] = d.decks.id("Default::1")
     d.addNote(f)
     # make it a review card
     c = f.cards()[0]
@@ -942,13 +981,13 @@ def test_deckDue():
     c.flush()
     # add one more with a new deck
     f = d.newNote()
-    f['Front'] = "two"
-    foobar = f.model()['did'] = d.decks.id("foo::bar")
+    f["Front"] = "two"
+    foobar = f.model()["did"] = d.decks.id("foo::bar")
     d.addNote(f)
     # and one that's a sibling
     f = d.newNote()
-    f['Front'] = "three"
-    foobaz = f.model()['did'] = d.decks.id("foo::baz")
+    f["Front"] = "three"
+    foobaz = f.model()["did"] = d.decks.id("foo::baz")
     d.addNote(f)
     d.reset()
     assert len(d.decks.decks) == 5
@@ -970,10 +1009,12 @@ def test_deckDue():
     assert tree[0][5][0][2] == 1
     assert tree[0][5][0][4] == 0
     # code should not fail if a card has an invalid deck
-    c.did = 12345; c.flush()
+    c.did = 12345
+    c.flush()
     d.sched.deckDueList()
     d.sched.deckDueTree()
 
+
 def test_deckTree():
     d = getEmptyCol()
     d.decks.id("new::b::c")
@@ -983,75 +1024,80 @@ def test_deckTree():
     names.remove("new")
     assert "new" not in names
 
+
 def test_deckFlow():
     d = getEmptyCol()
     # add a note with default deck
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     # and one that's a child
     f = d.newNote()
-    f['Front'] = "two"
-    default1 = f.model()['did'] = d.decks.id("Default::2")
+    f["Front"] = "two"
+    default1 = f.model()["did"] = d.decks.id("Default::2")
     d.addNote(f)
     # and another that's higher up
     f = d.newNote()
-    f['Front'] = "three"
-    default1 = f.model()['did'] = d.decks.id("Default::1")
+    f["Front"] = "three"
+    default1 = f.model()["did"] = d.decks.id("Default::1")
     d.addNote(f)
     # should get top level one first, then ::1, then ::2
     d.reset()
-    assert d.sched.counts() == (3,0,0)
+    assert d.sched.counts() == (3, 0, 0)
     for i in "one", "three", "two":
         c = d.sched.getCard()
-        assert c.note()['Front'] == i
+        assert c.note()["Front"] == i
         d.sched.answerCard(c, 2)
 
+
 def test_reorder():
     d = getEmptyCol()
     # add a note with default deck
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     f2 = d.newNote()
-    f2['Front'] = "two"
+    f2["Front"] = "two"
     d.addNote(f2)
     assert f2.cards()[0].due == 2
-    found=False
+    found = False
     # 50/50 chance of being reordered
     for i in range(20):
         d.sched.randomizeCards(1)
         if f.cards()[0].due != f.id:
-            found=True
+            found = True
             break
     assert found
     d.sched.orderCards(1)
     assert f.cards()[0].due == 1
     # shifting
     f3 = d.newNote()
-    f3['Front'] = "three"
+    f3["Front"] = "three"
     d.addNote(f3)
     f4 = d.newNote()
-    f4['Front'] = "four"
+    f4["Front"] = "four"
     d.addNote(f4)
     assert f.cards()[0].due == 1
     assert f2.cards()[0].due == 2
     assert f3.cards()[0].due == 3
     assert f4.cards()[0].due == 4
-    d.sched.sortCards([
-        f3.cards()[0].id, f4.cards()[0].id], start=1, shift=True)
+    d.sched.sortCards([f3.cards()[0].id, f4.cards()[0].id], start=1, shift=True)
     assert f.cards()[0].due == 3
     assert f2.cards()[0].due == 4
     assert f3.cards()[0].due == 1
     assert f4.cards()[0].due == 2
 
+
 def test_forget():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
-    c.queue = 2; c.type = 2; c.ivl = 100; c.due = 0
+    c.queue = 2
+    c.type = 2
+    c.ivl = 100
+    c.due = 0
     c.flush()
     d.reset()
     assert d.sched.counts() == (0, 0, 1)
@@ -1059,10 +1105,11 @@ def test_forget():
     d.reset()
     assert d.sched.counts() == (1, 0, 0)
 
+
 def test_resched():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     d.sched.reschedCards([c.id], 0, 0)
@@ -1072,14 +1119,15 @@ def test_resched():
     assert c.queue == c.type == 2
     d.sched.reschedCards([c.id], 1, 1)
     c.load()
-    assert c.due == d.sched.today+1
+    assert c.due == d.sched.today + 1
     assert c.ivl == +1
 
+
 def test_norelearn():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     c.type = 2
@@ -1093,13 +1141,15 @@ def test_norelearn():
     c.flush()
     d.reset()
     d.sched.answerCard(c, 1)
-    d.sched._cardConf(c)['lapse']['delays'] = []
+    d.sched._cardConf(c)["lapse"]["delays"] = []
     d.sched.answerCard(c, 1)
 
+
 def test_failmult():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     c = f.cards()[0]
     c.type = 2
@@ -1111,7 +1161,7 @@ def test_failmult():
     c.lapses = 1
     c.startTimer()
     c.flush()
-    d.sched._cardConf(c)['lapse']['mult'] = 0.5
+    d.sched._cardConf(c)["lapse"]["mult"] = 0.5
     c = d.sched.getCard()
     d.sched.answerCard(c, 1)
     assert c.ivl == 50

tests/test_schedv2.py

@@ -1,34 +1,49 @@
 # coding: utf-8
 
-import time
 import copy
+import time
 
 from anki.consts import STARTING_FACTOR
-from tests.shared import getEmptyCol
-from anki.utils import  intTime
 from anki.hooks import addHook
+from anki.utils import intTime
+from tests.shared import getEmptyCol
+
+# Between 2-4AM, shift the time back so test assumptions hold.
+lt = time.localtime()
+if lt.tm_hour > 2 and lt.tm_hour < 4:
+    orig_time = time.time
+
+    def adjusted_time():
+        return orig_time() - 60 * 60 * 2
+
+    time.time = adjusted_time
+
 
 def test_clock():
     d = getEmptyCol()
-    if (d.sched.dayCutoff - intTime()) < 10*60:
+    if (d.sched.dayCutoff - intTime()) < 10 * 60:
         raise Exception("Unit tests will fail around the day rollover.")
 
+
 def checkRevIvl(d, c, targetIvl):
     min, max = d.sched._fuzzIvlRange(targetIvl)
     return min <= c.ivl <= max
 
+
 def test_basics():
     d = getEmptyCol()
     d.reset()
     assert not d.sched.getCard()
 
+
 def test_new():
     d = getEmptyCol()
     d.reset()
     assert d.sched.newCount == 0
     # add a note
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     d.reset()
     assert d.sched.newCount == 1
@@ -66,15 +81,16 @@ def test_new():
     #     assert qs[n] in c.q()
     #     d.sched.answerCard(c, 2)
 
+
 def test_newLimits():
     d = getEmptyCol()
     # add some notes
     g2 = d.decks.id("Default::foo")
     for i in range(30):
         f = d.newNote()
-        f['Front'] = str(i)
+        f["Front"] = str(i)
         if i > 4:
-            f.model()['did'] = g2
+            f.model()["did"] = g2
         d.addNote(f)
     # give the child deck a different configuration
     c2 = d.decks.confId("new conf")
@@ -87,33 +103,36 @@ def test_newLimits():
     assert c.did == 1
     # limit the parent to 10 cards, meaning we get 10 in total
     conf1 = d.decks.confForDid(1)
-    conf1['new']['perDay'] = 10
+    conf1["new"]["perDay"] = 10
     d.reset()
     assert d.sched.newCount == 10
     # if we limit child to 4, we should get 9
     conf2 = d.decks.confForDid(g2)
-    conf2['new']['perDay'] = 4
+    conf2["new"]["perDay"] = 4
     d.reset()
     assert d.sched.newCount == 9
 
+
 def test_newBoxes():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     d.reset()
     c = d.sched.getCard()
-    d.sched._cardConf(c)['new']['delays'] = [1,2,3,4,5]
+    d.sched._cardConf(c)["new"]["delays"] = [1, 2, 3, 4, 5]
     d.sched.answerCard(c, 2)
     # should handle gracefully
-    d.sched._cardConf(c)['new']['delays'] = [1]
+    d.sched._cardConf(c)["new"]["delays"] = [1]
     d.sched.answerCard(c, 2)
 
+
 def test_learn():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     f = d.addNote(f)
     # set as a learn card and rebuild queues
     d.db.execute("update cards set queue=0, type=0")
@@ -121,12 +140,12 @@ def test_learn():
     # sched.getCard should return it, since it's due in the past
     c = d.sched.getCard()
     assert c
-    d.sched._cardConf(c)['new']['delays'] = [0.5, 3, 10]
+    d.sched._cardConf(c)["new"]["delays"] = [0.5, 3, 10]
     # fail it
     d.sched.answerCard(c, 1)
     # it should have three reps left to graduation
-    assert c.left%1000 == 3
-    assert c.left//1000 == 3
+    assert c.left % 1000 == 3
+    assert c.left // 1000 == 3
     # it should by due in 30 seconds
     t = round(c.due - time.time())
     assert t >= 25 and t <= 40
@@ -134,9 +153,9 @@ def test_learn():
     d.sched.answerCard(c, 3)
     # it should by due in 3 minutes
     dueIn = c.due - time.time()
-    assert 179 <= dueIn <= 180*1.25
-    assert c.left%1000 == 2
-    assert c.left//1000 == 2
+    assert 179 <= dueIn <= 180 * 1.25
+    assert c.left % 1000 == 2
+    assert c.left // 1000 == 2
     # check log is accurate
     log = d.db.first("select * from revlog order by id desc")
     assert log[3] == 3
@@ -146,9 +165,9 @@ def test_learn():
     d.sched.answerCard(c, 3)
     # it should by due in 10 minutes
     dueIn = c.due - time.time()
-    assert 599 <= dueIn <= 600*1.25
-    assert c.left%1000 == 1
-    assert c.left//1000 == 1
+    assert 599 <= dueIn <= 600 * 1.25
+    assert c.left % 1000 == 1
+    assert c.left // 1000 == 1
     # the next pass should graduate the card
     assert c.queue == 1
     assert c.type == 1
@@ -156,7 +175,7 @@ def test_learn():
     assert c.queue == 2
     assert c.type == 2
     # should be due tomorrow, with an interval of 1
-    assert c.due == d.sched.today+1
+    assert c.due == d.sched.today + 1
     assert c.ivl == 1
     # or normal removal
     c.type = 0
@@ -168,10 +187,11 @@ def test_learn():
     # revlog should have been updated each time
     assert d.db.scalar("select count() from revlog where type = 0") == 5
 
+
 def test_relearn():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     c.ivl = 100
@@ -193,10 +213,11 @@ def test_relearn():
     assert c.ivl == 2
     assert c.due == d.sched.today + c.ivl
 
+
 def test_relearn_no_steps():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     c.ivl = 100
@@ -205,7 +226,7 @@ def test_relearn_no_steps():
     c.flush()
 
     conf = d.decks.confForDid(1)
-    conf['lapse']['delays'] = []
+    conf["lapse"]["delays"] = []
     d.decks.save(conf)
 
     # fail the card
@@ -214,14 +235,15 @@ def test_relearn_no_steps():
     d.sched.answerCard(c, 1)
     assert c.type == c.queue == 2
 
+
 def test_learn_collapsed():
     d = getEmptyCol()
     # add 2 notes
     f = d.newNote()
-    f['Front'] = "1"
+    f["Front"] = "1"
     f = d.addNote(f)
     f = d.newNote()
-    f['Front'] = "2"
+    f["Front"] = "2"
     f = d.addNote(f)
     # set as a learn card and rebuild queues
     d.db.execute("update cards set queue=0, type=0")
@@ -240,27 +262,28 @@ def test_learn_collapsed():
     c = d.sched.getCard()
     assert not c.q().endswith("2")
 
+
 def test_learn_day():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     f = d.addNote(f)
     d.sched.reset()
     c = d.sched.getCard()
-    d.sched._cardConf(c)['new']['delays'] = [1, 10, 1440, 2880]
+    d.sched._cardConf(c)["new"]["delays"] = [1, 10, 1440, 2880]
     # pass it
     d.sched.answerCard(c, 3)
     # two reps to graduate, 1 more today
-    assert c.left%1000 == 3
-    assert c.left//1000 == 1
+    assert c.left % 1000 == 3
+    assert c.left // 1000 == 1
     assert d.sched.counts() == (0, 1, 0)
     c = d.sched.getCard()
     ni = d.sched.nextIvl
     assert ni(c, 3) == 86400
     # answering it will place it in queue 3
     d.sched.answerCard(c, 3)
-    assert c.due == d.sched.today+1
+    assert c.due == d.sched.today + 1
     assert c.queue == 3
     assert not d.sched.getCard()
     # for testing, move it back a day
@@ -270,7 +293,7 @@ def test_learn_day():
     assert d.sched.counts() == (0, 1, 0)
     c = d.sched.getCard()
     # nextIvl should work
-    assert ni(c, 3) == 86400*2
+    assert ni(c, 3) == 86400 * 2
     # if we fail it, it should be back in the correct queue
     d.sched.answerCard(c, 1)
     assert c.queue == 1
@@ -292,17 +315,19 @@ def test_learn_day():
     c.flush()
     d.reset()
     assert d.sched.counts() == (0, 0, 1)
-    d.sched._cardConf(c)['lapse']['delays'] = [1440]
+    d.sched._cardConf(c)["lapse"]["delays"] = [1440]
     c = d.sched.getCard()
     d.sched.answerCard(c, 1)
     assert c.queue == 3
     assert d.sched.counts() == (0, 0, 0)
 
+
 def test_reviews():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     # set the card up as a review card, due 8 days ago
     c = f.cards()[0]
@@ -359,8 +384,10 @@ def test_reviews():
     c.flush()
     # steup hook
     hooked = []
+
     def onLeech(card):
         hooked.append(1)
+
     addHook("leech", onLeech)
     d.sched.answerCard(c, 1)
     assert hooked
@@ -368,6 +395,7 @@ def test_reviews():
     c.load()
     assert c.queue == -1
 
+
 def test_review_limits():
     d = getEmptyCol()
 
@@ -377,21 +405,22 @@ def test_review_limits():
     pconf = d.decks.getConf(d.decks.confId("parentConf"))
     cconf = d.decks.getConf(d.decks.confId("childConf"))
 
-    pconf['rev']['perDay'] = 5
+    pconf["rev"]["perDay"] = 5
     d.decks.updateConf(pconf)
-    d.decks.setConf(parent, pconf['id'])
-    cconf['rev']['perDay'] = 10
+    d.decks.setConf(parent, pconf["id"])
+    cconf["rev"]["perDay"] = 10
     d.decks.updateConf(cconf)
-    d.decks.setConf(child, cconf['id'])
+    d.decks.setConf(child, cconf["id"])
 
     m = d.models.current()
-    m['did'] = child['id']
+    m["did"] = child["id"]
     d.models.save(m, updateReqs=False)
 
     # add some cards
     for i in range(20):
         f = d.newNote()
-        f['Front'] = "one"; f['Back'] = "two"
+        f["Front"] = "one"
+        f["Back"] = "two"
         d.addNote(f)
 
         # make them reviews
@@ -402,11 +431,11 @@ def test_review_limits():
 
     tree = d.sched.deckDueTree()
     # (('Default', 1, 0, 0, 0, ()), ('parent', 1514457677462, 5, 0, 0, (('child', 1514457677463, 5, 0, 0, ()),)))
-    assert tree[1][2] == 5 # parent
-    assert tree[1][5][0][2] == 5 # child
+    assert tree[1][2] == 5  # parent
+    assert tree[1][5][0][2] == 5  # child
 
     # .counts() should match
-    d.decks.select(child['id'])
+    d.decks.select(child["id"])
     d.sched.reset()
     assert d.sched.counts() == (0, 0, 5)
 
@@ -416,24 +445,25 @@ def test_review_limits():
     assert d.sched.counts() == (0, 0, 4)
 
     tree = d.sched.deckDueTree()
-    assert tree[1][2] == 4 # parent
-    assert tree[1][5][0][2] == 4 # child
+    assert tree[1][2] == 4  # parent
+    assert tree[1][5][0][2] == 4  # child
 
     # switch limits
-    d.decks.setConf(parent, cconf['id'])
-    d.decks.setConf(child, pconf['id'])
-    d.decks.select(parent['id'])
+    d.decks.setConf(parent, cconf["id"])
+    d.decks.setConf(child, pconf["id"])
+    d.decks.select(parent["id"])
     d.sched.reset()
 
     # child limits do not affect the parent
     tree = d.sched.deckDueTree()
-    assert tree[1][2] == 9 # parent
-    assert tree[1][5][0][2] == 4 # child
+    assert tree[1][2] == 9  # parent
+    assert tree[1][5][0][2] == 4  # child
+
 
 def test_button_spacing():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     # 1 day ivl review card due now
     c = f.cards()[0]
@@ -452,16 +482,17 @@ def test_button_spacing():
 
     # if hard factor is <= 1, then hard may not increase
     conf = d.decks.confForDid(1)
-    conf['rev']['hardFactor'] = 1
+    conf["rev"]["hardFactor"] = 1
     assert ni(c, 2) == "1 day"
 
+
 def test_overdue_lapse():
     # disabled in commit 3069729776990980f34c25be66410e947e9d51a2
     return
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     # simulate a review that was lapsed and is now due for its normal review
     c = f.cards()[0]
@@ -490,13 +521,15 @@ def test_overdue_lapse():
     d.sched.reset()
     assert d.sched.counts() == (0, 0, 1)
 
+
 def test_finished():
     d = getEmptyCol()
     # nothing due
     assert "Congratulations" in d.sched.finishedMsg()
     assert "limit" not in d.sched.finishedMsg()
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     # have a new card
     assert "new cards available" in d.sched.finishedMsg()
@@ -509,47 +542,49 @@ def test_finished():
     assert "Congratulations" in d.sched.finishedMsg()
     assert "limit" not in d.sched.finishedMsg()
 
+
 def test_nextIvl():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     d.reset()
     conf = d.decks.confForDid(1)
-    conf['new']['delays'] = [0.5, 3, 10]
-    conf['lapse']['delays'] = [1, 5, 9]
+    conf["new"]["delays"] = [0.5, 3, 10]
+    conf["lapse"]["delays"] = [1, 5, 9]
     c = d.sched.getCard()
     # new cards
     ##################################################
     ni = d.sched.nextIvl
     assert ni(c, 1) == 30
-    assert ni(c, 2) == (30+180)//2
+    assert ni(c, 2) == (30 + 180) // 2
     assert ni(c, 3) == 180
-    assert ni(c, 4) == 4*86400
+    assert ni(c, 4) == 4 * 86400
     d.sched.answerCard(c, 1)
     # cards in learning
     ##################################################
     assert ni(c, 1) == 30
-    assert ni(c, 2) == (30+180)//2
+    assert ni(c, 2) == (30 + 180) // 2
     assert ni(c, 3) == 180
-    assert ni(c, 4) == 4*86400
+    assert ni(c, 4) == 4 * 86400
     d.sched.answerCard(c, 3)
     assert ni(c, 1) == 30
-    assert ni(c, 2) == (180+600)//2
+    assert ni(c, 2) == (180 + 600) // 2
     assert ni(c, 3) == 600
-    assert ni(c, 4) == 4*86400
+    assert ni(c, 4) == 4 * 86400
     d.sched.answerCard(c, 3)
     # normal graduation is tomorrow
-    assert ni(c, 3) == 1*86400
-    assert ni(c, 4) == 4*86400
+    assert ni(c, 3) == 1 * 86400
+    assert ni(c, 4) == 4 * 86400
     # lapsed cards
     ##################################################
     c.type = 2
     c.ivl = 100
     c.factor = STARTING_FACTOR
     assert ni(c, 1) == 60
-    assert ni(c, 3) == 100*86400
-    assert ni(c, 4) == 101*86400
+    assert ni(c, 3) == 100 * 86400
+    assert ni(c, 4) == 101 * 86400
     # review cards
     ##################################################
     c.queue = 2
@@ -558,8 +593,8 @@ def test_nextIvl():
     # failing it should put it at 60s
     assert ni(c, 1) == 60
     # or 1 day if relearn is false
-    d.sched._cardConf(c)['lapse']['delays']=[]
-    assert ni(c, 1) == 1*86400
+    d.sched._cardConf(c)["lapse"]["delays"] = []
+    assert ni(c, 1) == 1 * 86400
     # (* 100 1.2 86400)10368000.0
     assert ni(c, 2) == 10368000
     # (* 100 2.5 86400)21600000.0
@@ -568,14 +603,15 @@ def test_nextIvl():
     assert ni(c, 4) == 28080000
     assert d.sched.nextIvlStr(c, 4) == "10.8 months"
 
+
 def test_bury():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     f = d.newNote()
-    f['Front'] = "two"
+    f["Front"] = "two"
     d.addNote(f)
     c2 = f.cards()[0]
     # burying
@@ -590,11 +626,14 @@ def test_bury():
     assert not d.sched.getCard()
 
     d.sched.unburyCardsForDeck(type="manual")
-    c.load(); assert c.queue == 0
-    c2.load(); assert c2.queue == -2
+    c.load()
+    assert c.queue == 0
+    c2.load()
+    assert c2.queue == -2
 
     d.sched.unburyCardsForDeck(type="siblings")
-    c2.load(); assert c2.queue == 0
+    c2.load()
+    assert c2.queue == 0
 
     d.sched.buryCards([c.id, c2.id])
     d.sched.unburyCardsForDeck(type="all")
@@ -603,10 +642,11 @@ def test_bury():
 
     assert d.sched.counts() == (2, 0, 0)
 
+
 def test_suspend():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     # suspending
@@ -620,7 +660,11 @@ def test_suspend():
     d.reset()
     assert d.sched.getCard()
     # should cope with rev cards being relearnt
-    c.due = 0; c.ivl = 100; c.type = 2; c.queue = 2; c.flush()
+    c.due = 0
+    c.ivl = 100
+    c.type = 2
+    c.queue = 2
+    c.flush()
     d.reset()
     c = d.sched.getCard()
     d.sched.answerCard(c, 1)
@@ -648,10 +692,11 @@ def test_suspend():
     assert c.did != 1
     assert c.odue == 1
 
+
 def test_filt_reviewing_early_normal():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     c.ivl = 100
@@ -663,7 +708,7 @@ def test_filt_reviewing_early_normal():
     c.startTimer()
     c.flush()
     d.reset()
-    assert d.sched.counts() == (0,0,0)
+    assert d.sched.counts() == (0, 0, 0)
     # create a dynamic deck and refresh it
     did = d.decks.newDyn("Cram")
     d.sched.rebuildDyn(did)
@@ -671,14 +716,14 @@ def test_filt_reviewing_early_normal():
     # should appear as normal in the deck list
     assert sorted(d.sched.deckDueList())[0][2] == 1
     # and should appear in the counts
-    assert d.sched.counts() == (0,0,1)
+    assert d.sched.counts() == (0, 0, 1)
     # grab it and check estimates
     c = d.sched.getCard()
     assert d.sched.answerButtons(c) == 4
     assert d.sched.nextIvl(c, 1) == 600
-    assert d.sched.nextIvl(c, 2) == int(75*1.2)*86400
-    assert d.sched.nextIvl(c, 3) == int(75*2.5)*86400
-    assert d.sched.nextIvl(c, 4) == int(75*2.5*1.15)*86400
+    assert d.sched.nextIvl(c, 2) == int(75 * 1.2) * 86400
+    assert d.sched.nextIvl(c, 3) == int(75 * 2.5) * 86400
+    assert d.sched.nextIvl(c, 4) == int(75 * 2.5 * 1.15) * 86400
 
     # answer 'good'
     d.sched.answerCard(c, 3)
@@ -688,8 +733,7 @@ def test_filt_reviewing_early_normal():
     # should not be in learning
     assert c.queue == 2
     # should be logged as a cram rep
-    assert d.db.scalar(
-        "select type from revlog order by id desc limit 1") == 3
+    assert d.db.scalar("select type from revlog order by id desc limit 1") == 3
 
     # due in 75 days, so it's been waiting 25 days
     c.ivl = 100
@@ -699,20 +743,21 @@ def test_filt_reviewing_early_normal():
     d.reset()
     c = d.sched.getCard()
 
-    assert d.sched.nextIvl(c, 2) == 60*86400
-    assert d.sched.nextIvl(c, 3) == 100*86400
-    assert d.sched.nextIvl(c, 4) == 114*86400
+    assert d.sched.nextIvl(c, 2) == 60 * 86400
+    assert d.sched.nextIvl(c, 3) == 100 * 86400
+    assert d.sched.nextIvl(c, 4) == 114 * 86400
+
 
 def test_filt_keep_lrn_state():
     d = getEmptyCol()
 
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
 
     # fail the card outside filtered deck
     c = d.sched.getCard()
-    d.sched._cardConf(c)['new']['delays'] = [1, 10, 61]
+    d.sched._cardConf(c)["new"]["delays"] = [1, 10, 61]
     d.decks.save()
 
     d.sched.answerCard(c, 1)
@@ -736,30 +781,31 @@ def test_filt_keep_lrn_state():
     # should be able to advance learning steps
     d.sched.answerCard(c, 3)
     # should be due at least an hour in the future
-    assert c.due - intTime() > 60*60
+    assert c.due - intTime() > 60 * 60
 
     # emptying the deck preserves learning state
     d.sched.emptyDyn(did)
     c.load()
     assert c.type == c.queue == 1
     assert c.left == 1001
-    assert c.due - intTime() > 60*60
+    assert c.due - intTime() > 60 * 60
+
 
 def test_preview():
     # add cards
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     orig = copy.copy(c)
     f2 = d.newNote()
-    f2['Front'] = "two"
+    f2["Front"] = "two"
     d.addNote(f2)
     # cram deck
     did = d.decks.newDyn("Cram")
     cram = d.decks.get(did)
-    cram['resched'] = False
+    cram["resched"] = False
     d.sched.rebuildDyn(did)
     d.reset()
     # grab the first card
@@ -793,22 +839,25 @@ def test_preview():
     assert c.reps == 0
     assert c.type == 0
 
+
 def test_ordcycle():
     d = getEmptyCol()
     # add two more templates and set second active
-    m = d.models.current(); mm = d.models
+    m = d.models.current()
+    mm = d.models
     t = mm.newTemplate("Reverse")
-    t['qfmt'] = "{{Back}}"
-    t['afmt'] = "{{Front}}"
+    t["qfmt"] = "{{Back}}"
+    t["afmt"] = "{{Front}}"
     mm.addTemplate(m, t)
     t = mm.newTemplate("f2")
-    t['qfmt'] = "{{Front}}"
-    t['afmt'] = "{{Back}}"
+    t["qfmt"] = "{{Front}}"
+    t["afmt"] = "{{Back}}"
     mm.addTemplate(m, t)
     mm.save(m)
     # create a new note; it should have 3 cards
     f = d.newNote()
-    f['Front'] = "1"; f['Back'] = "1"
+    f["Front"] = "1"
+    f["Back"] = "1"
     d.addNote(f)
     assert d.cardCount() == 3
     d.reset()
@@ -817,10 +866,12 @@ def test_ordcycle():
     assert d.sched.getCard().ord == 1
     assert d.sched.getCard().ord == 2
 
+
 def test_counts_idx():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     d.reset()
     assert d.sched.counts() == (1, 0, 0)
@@ -839,10 +890,11 @@ def test_counts_idx():
     d.sched.answerCard(c, 1)
     assert d.sched.counts() == (0, 1, 0)
 
+
 def test_repCounts():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     d.reset()
     # lrnReps should be accurate on pass/fail
@@ -860,7 +912,7 @@ def test_repCounts():
     d.sched.answerCard(d.sched.getCard(), 3)
     assert d.sched.counts() == (0, 0, 0)
     f = d.newNote()
-    f['Front'] = "two"
+    f["Front"] = "two"
     d.addNote(f)
     d.reset()
     # initial pass should be correct too
@@ -872,14 +924,14 @@ def test_repCounts():
     assert d.sched.counts() == (0, 0, 0)
     # immediate graduate should work
     f = d.newNote()
-    f['Front'] = "three"
+    f["Front"] = "three"
     d.addNote(f)
     d.reset()
     d.sched.answerCard(d.sched.getCard(), 4)
     assert d.sched.counts() == (0, 0, 0)
     # and failing a review should too
     f = d.newNote()
-    f['Front'] = "three"
+    f["Front"] = "three"
     d.addNote(f)
     c = f.cards()[0]
     c.type = 2
@@ -891,12 +943,13 @@ def test_repCounts():
     d.sched.answerCard(d.sched.getCard(), 1)
     assert d.sched.counts() == (0, 1, 0)
 
+
 def test_timing():
     d = getEmptyCol()
     # add a few review cards, due today
     for i in range(5):
         f = d.newNote()
-        f['Front'] = "num"+str(i)
+        f["Front"] = "num" + str(i)
         d.addNote(f)
         c = f.cards()[0]
         c.type = 2
@@ -917,11 +970,12 @@ def test_timing():
     c = d.sched.getCard()
     assert c.queue == 1
 
+
 def test_collapse():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     d.reset()
     # test collapsing
@@ -931,16 +985,17 @@ def test_collapse():
     d.sched.answerCard(c, 4)
     assert not d.sched.getCard()
 
+
 def test_deckDue():
     d = getEmptyCol()
     # add a note with default deck
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     # and one that's a child
     f = d.newNote()
-    f['Front'] = "two"
-    default1 = f.model()['did'] = d.decks.id("Default::1")
+    f["Front"] = "two"
+    default1 = f.model()["did"] = d.decks.id("Default::1")
     d.addNote(f)
     # make it a review card
     c = f.cards()[0]
@@ -949,13 +1004,13 @@ def test_deckDue():
     c.flush()
     # add one more with a new deck
     f = d.newNote()
-    f['Front'] = "two"
-    foobar = f.model()['did'] = d.decks.id("foo::bar")
+    f["Front"] = "two"
+    foobar = f.model()["did"] = d.decks.id("foo::bar")
     d.addNote(f)
     # and one that's a sibling
     f = d.newNote()
-    f['Front'] = "three"
-    foobaz = f.model()['did'] = d.decks.id("foo::baz")
+    f["Front"] = "three"
+    foobaz = f.model()["did"] = d.decks.id("foo::baz")
     d.addNote(f)
     d.reset()
     assert len(d.decks.decks) == 5
@@ -977,10 +1032,12 @@ def test_deckDue():
     assert tree[0][5][0][2] == 1
     assert tree[0][5][0][4] == 0
     # code should not fail if a card has an invalid deck
-    c.did = 12345; c.flush()
+    c.did = 12345
+    c.flush()
     d.sched.deckDueList()
     d.sched.deckDueTree()
 
+
 def test_deckTree():
     d = getEmptyCol()
     d.decks.id("new::b::c")
@@ -990,75 +1047,80 @@ def test_deckTree():
     names.remove("new")
     assert "new" not in names
 
+
 def test_deckFlow():
     d = getEmptyCol()
     # add a note with default deck
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     # and one that's a child
     f = d.newNote()
-    f['Front'] = "two"
-    default1 = f.model()['did'] = d.decks.id("Default::2")
+    f["Front"] = "two"
+    default1 = f.model()["did"] = d.decks.id("Default::2")
     d.addNote(f)
     # and another that's higher up
     f = d.newNote()
-    f['Front'] = "three"
-    default1 = f.model()['did'] = d.decks.id("Default::1")
+    f["Front"] = "three"
+    default1 = f.model()["did"] = d.decks.id("Default::1")
     d.addNote(f)
     # should get top level one first, then ::1, then ::2
     d.reset()
-    assert d.sched.counts() == (3,0,0)
+    assert d.sched.counts() == (3, 0, 0)
     for i in "one", "three", "two":
         c = d.sched.getCard()
-        assert c.note()['Front'] == i
+        assert c.note()["Front"] == i
         d.sched.answerCard(c, 3)
 
+
 def test_reorder():
     d = getEmptyCol()
     # add a note with default deck
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     f2 = d.newNote()
-    f2['Front'] = "two"
+    f2["Front"] = "two"
     d.addNote(f2)
     assert f2.cards()[0].due == 2
-    found=False
+    found = False
     # 50/50 chance of being reordered
     for i in range(20):
         d.sched.randomizeCards(1)
         if f.cards()[0].due != f.id:
-            found=True
+            found = True
             break
     assert found
     d.sched.orderCards(1)
     assert f.cards()[0].due == 1
     # shifting
     f3 = d.newNote()
-    f3['Front'] = "three"
+    f3["Front"] = "three"
     d.addNote(f3)
     f4 = d.newNote()
-    f4['Front'] = "four"
+    f4["Front"] = "four"
     d.addNote(f4)
     assert f.cards()[0].due == 1
     assert f2.cards()[0].due == 2
     assert f3.cards()[0].due == 3
     assert f4.cards()[0].due == 4
-    d.sched.sortCards([
-        f3.cards()[0].id, f4.cards()[0].id], start=1, shift=True)
+    d.sched.sortCards([f3.cards()[0].id, f4.cards()[0].id], start=1, shift=True)
     assert f.cards()[0].due == 3
     assert f2.cards()[0].due == 4
     assert f3.cards()[0].due == 1
     assert f4.cards()[0].due == 2
 
+
 def test_forget():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
-    c.queue = 2; c.type = 2; c.ivl = 100; c.due = 0
+    c.queue = 2
+    c.type = 2
+    c.ivl = 100
+    c.due = 0
     c.flush()
     d.reset()
     assert d.sched.counts() == (0, 0, 1)
@@ -1066,10 +1128,11 @@ def test_forget():
     d.reset()
     assert d.sched.counts() == (1, 0, 0)
 
+
 def test_resched():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     d.sched.reschedCards([c.id], 0, 0)
@@ -1079,14 +1142,15 @@ def test_resched():
     assert c.queue == c.type == 2
     d.sched.reschedCards([c.id], 1, 1)
     c.load()
-    assert c.due == d.sched.today+1
+    assert c.due == d.sched.today + 1
     assert c.ivl == +1
 
+
 def test_norelearn():
     d = getEmptyCol()
     # add a note
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     c = f.cards()[0]
     c.type = 2
@@ -1100,13 +1164,15 @@ def test_norelearn():
     c.flush()
     d.reset()
     d.sched.answerCard(c, 1)
-    d.sched._cardConf(c)['lapse']['delays'] = []
+    d.sched._cardConf(c)["lapse"]["delays"] = []
     d.sched.answerCard(c, 1)
 
+
 def test_failmult():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     c = f.cards()[0]
     c.type = 2
@@ -1118,19 +1184,20 @@ def test_failmult():
     c.lapses = 1
     c.startTimer()
     c.flush()
-    d.sched._cardConf(c)['lapse']['mult'] = 0.5
+    d.sched._cardConf(c)["lapse"]["mult"] = 0.5
     c = d.sched.getCard()
     d.sched.answerCard(c, 1)
     assert c.ivl == 50
     d.sched.answerCard(c, 1)
     assert c.ivl == 25
 
+
 def test_moveVersions():
     col = getEmptyCol()
     col.changeSchedulerVer(1)
 
     n = col.newNote()
-    n['Front'] = "one"
+    n["Front"] = "one"
     col.addNote(n)
 
     # make it a learning card
@@ -1168,8 +1235,10 @@ def test_moveVersions():
     col.changeSchedulerVer(2)
     # card with 100 day interval, answering again
     col.sched.reschedCards([c.id], 100, 100)
-    c.load(); c.due = 0; c.flush()
-    col.sched._cardConf(c)['lapse']['mult'] = 0.5
+    c.load()
+    c.due = 0
+    c.flush()
+    col.sched._cardConf(c)["lapse"]["mult"] = 0.5
     col.sched.reset()
     c = col.sched.getCard()
     col.sched.answerCard(c, 1)
@@ -1178,6 +1247,7 @@ def test_moveVersions():
     c.load()
     assert c.due == 50
 
+
 # cards with a due date earlier than the collection should retain
 # their due date when removed
 def test_negativeDueFilter():
@@ -1185,7 +1255,8 @@ def test_negativeDueFilter():
 
     # card due prior to collection date
     f = d.newNote()
-    f['Front'] = "one"; f['Back'] = "two"
+    f["Front"] = "one"
+    f["Back"] = "two"
     d.addNote(f)
     c = f.cards()[0]
     c.due = -5
@@ -1201,4 +1272,3 @@ def test_negativeDueFilter():
 
     c.load()
     assert c.due == -5
-

tests/test_stats.py

@@ -1,12 +1,15 @@
 # coding: utf-8
 
-import  os
-from tests.shared import  getEmptyCol
+import os
+import tempfile
+
+from tests.shared import getEmptyCol
+
 
 def test_stats():
     d = getEmptyCol()
     f = d.newNote()
-    f['Front'] = "foo"
+    f["Front"] = "foo"
     d.addNote(f)
     c = f.cards()[0]
     # card stats
@@ -17,15 +20,20 @@ def test_stats():
     d.sched.answerCard(c, 2)
     assert d.cardStats(c)
 
+
 def test_graphs_empty():
     d = getEmptyCol()
     assert d.stats().report()
 
+
 def test_graphs():
     from anki import Collection as aopen
-    d = aopen(os.path.expanduser("~/test.anki2"))
+
+    dir = tempfile.gettempdir()
+
+    d = aopen(os.path.join(dir, "test.anki2"))
     g = d.stats()
     rep = g.report()
-    with open(os.path.expanduser("~/test.html"), "w") as f:
+    with open(os.path.join(dir, "test.html"), "w") as f:
         f.write(rep)
     return

tests/test_template.py

@@ -2,15 +2,18 @@ from anki.template import Template
 
 
 def test_remove_formatting_from_mathjax():
-    t = Template('')
-    assert t._removeFormattingFromMathjax(r'\(2^{{c3::2}}\)', 3) == r'\(2^{{C3::2}}\)'
+    t = Template("")
+    assert t._removeFormattingFromMathjax(r"\(2^{{c3::2}}\)", 3) == r"\(2^{{C3::2}}\)"
 
-    txt = (r'{{c1::ok}} \(2^2\) {{c2::not ok}} \(2^{{c3::2}}\) \(x^3\) '
-           r'{{c4::blah}} {{c5::text with \(x^2\) jax}}')
+    txt = (
+        r"{{c1::ok}} \(2^2\) {{c2::not ok}} \(2^{{c3::2}}\) \(x^3\) "
+        r"{{c4::blah}} {{c5::text with \(x^2\) jax}}"
+    )
     # Cloze 2 is not in MathJax, so it should not get protected against
     # formatting.
     assert t._removeFormattingFromMathjax(txt, 2) == txt
 
-    txt = r'\(a\) {{c1::b}} \[ {{c1::c}} \]'
+    txt = r"\(a\) {{c1::b}} \[ {{c1::c}} \]"
     assert t._removeFormattingFromMathjax(txt, 1) == (
-        r'\(a\) {{c1::b}} \[ {{C1::c}} \]')
+        r"\(a\) {{c1::b}} \[ {{C1::c}} \]"
+    )

tests/test_undo.py

@@ -1,8 +1,10 @@
 # coding: utf-8
 
 import time
-from tests.shared import  getEmptyCol
+
 from anki.consts import *
+from tests.shared import getEmptyCol
+
 
 def test_op():
     d = getEmptyCol()
@@ -10,7 +12,7 @@ def test_op():
     assert not d.undoName()
     # let's adjust a study option
     d.save("studyopts")
-    d.conf['abc'] = 5
+    d.conf["abc"] = 5
     # it should be listed as undoable
     assert d.undoName() == "studyopts"
     # with about 5 minutes until it's clobbered
@@ -18,7 +20,7 @@ def test_op():
     # undoing should restore the old value
     d.undo()
     assert not d.undoName()
-    assert 'abc' not in d.conf
+    assert "abc" not in d.conf
     # an (auto)save will clear the undo
     d.save("foo")
     assert d.undoName() == "foo"
@@ -27,7 +29,7 @@ def test_op():
     # and a review will, too
     d.save("add")
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     d.reset()
     assert d.undoName() == "add"
@@ -35,11 +37,12 @@ def test_op():
     d.sched.answerCard(c, 2)
     assert d.undoName() == "Review"
 
+
 def test_review():
     d = getEmptyCol()
-    d.conf['counts'] = COUNT_REMAINING
+    d.conf["counts"] = COUNT_REMAINING
     f = d.newNote()
-    f['Front'] = "one"
+    f["Front"] = "one"
     d.addNote(f)
     d.reset()
     assert not d.undoName()
@@ -62,7 +65,7 @@ def test_review():
     assert not d.undoName()
     # we should be able to undo multiple answers too
     f = d.newNote()
-    f['Front'] = "two"
+    f["Front"] = "two"
     d.addNote(f)
     d.reset()
     assert d.sched.counts() == (2, 0, 0)
@@ -85,5 +88,3 @@ def test_review():
     assert d.undoName() == "foo"
     d.undo()
     assert not d.undoName()
-
-

tests/test_utils.py

@@ -2,6 +2,7 @@
 
 from anki.utils import fmtTimeSpan
 
+
 def test_fmtTimeSpan():
     assert fmtTimeSpan(5) == "5 seconds"
     assert fmtTimeSpan(5, inTime=True) == "in 5 seconds"

tools/tests.sh

@@ -10,11 +10,7 @@ set -e
 BIN="$(cd "`dirname "$0"`"; pwd)"
 export PYTHONPATH=${BIN}/..:${PYTHONPATH}
 
-# favour nosetests3 if available
-nose=nosetests
-if which nosetests3 >/dev/null 2>&1; then
-    nose=nosetests3
-fi
+nose="python -m nose2 --plugin=nose2.plugins.mp -N 16"
 
 dir=.
 
@@ -24,7 +20,4 @@ else
     lim="tests.test_$1"
 fi
 
-if [ x$coverage != x ]; then
-    args="--with-coverage"
-fi
-(cd $dir && $nose -s --processes=16 --process-timeout=300 $lim $args --cover-package=anki)
+(cd $dir && $nose $lim $args)

ts/package-lock.json

@@ -10,7 +10,7 @@
       "integrity": "sha512-Lz4BAJihoFw5nRzKvg4nawXPzutkv7wmfQ5121avptaSIXlDNJCUuxZxX/G+9EVidZGuO0UBlk+YjKbwRKJigg==",
       "dev": true,
       "requires": {
-        "@types/sizzle": "*"
+        "@types/sizzle": "2.3.2"
       }
     },
     "@types/jqueryui": {
@@ -19,7 +19,7 @@
       "integrity": "sha512-bHE7BiG+5Sviy/eA9Npz5HHF3hv40XjaEbpYtSJPaNwuyxhSJ0qWlE8C5DgNMfobVOZ2aSTrM1iGDCGmvlbxOg==",
       "dev": true,
       "requires": {
-        "@types/jquery": "*"
+        "@types/jquery": "3.3.31"
       }
     },
     "@types/mathjax": {