add basic type checking for anki/

.gitignore

@@ -8,3 +8,4 @@ aqt/forms
 locale
 tools/runanki.system
 anki/buildhash.py
+.mypy_cache

.travis.sh

@@ -8,5 +8,8 @@ echo "building ui..."
 echo "running unit tests..."
 nosetests ./tests
 
+echo "type checking..."
+./tools/typecheck.sh
+
 echo "linting..."
 ./tools/lint.sh

.travis.yml

@@ -6,6 +6,7 @@ install:
   - sudo apt-get update
   - sudo apt-get install portaudio19-dev
   - pip install -r requirements.txt
-  - pip install nose pylint pyqt5 pyqtwebengine
+  - pip install -r requirements.dev
+  - pip install pyqt5 pyqtwebengine
 
 script: ./.travis.sh

README.development

@@ -13,13 +13,14 @@ provide support for problems you encounter when running from source.
 Anki requires:
 
  - Python 3.6+
- - Qt 5.9.x/5.11.x/5.12.x and a PyQT that supports it
+ - Qt 5.9.x or 5.11.x+, and a PyQT that supports it
  - mpv
  - lame
 
 It also requires a number of Python packages, which you can grab via pip:
 
 $ pip3 install -r requirements.txt
+$ pip3 install -r requirements.dev
 
 If you're on a Linux distribution that packages a compatible Qt then you can
 use the distro's packages. Make sure you install the development tools (eg

anki/exporting.py

@@ -3,7 +3,7 @@
 # License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import re, os, zipfile, shutil, unicodedata
-import json
+import json, typing
 
 from anki.lang import _
 from anki.utils import ids2str, splitFields, namedtmp, stripHTML
@@ -11,7 +11,7 @@ from anki.hooks import runHook
 from anki import Collection
 
 class Exporter:
-    includeHTML = None
+    includeHTML: typing.Union[bool, None] = None
 
     def __init__(self, col, did=None):
         self.col = col
@@ -134,7 +134,7 @@ class AnkiExporter(Exporter):
 
     key = _("Anki 2.0 Deck")
     ext = ".anki2"
-    includeSched = False
+    includeSched: typing.Union[bool, None] = False
     includeMedia = True
 
     def __init__(self, col):

anki/hooks.py

@@ -14,11 +14,12 @@ automatically but can be called with _old().
 """
 
 import decorator
+from typing import Dict, List, Callable, Any
 
 # Hooks
 ##############################################################################
 
-_hooks = {}
+_hooks: Dict[str, List[Callable[..., Any]]] = {}
 
 def runHook(hook, *args):
     "Run all functions on hook."

anki/models.py

@@ -3,6 +3,7 @@
 # License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import copy, re, json
+from typing import Dict, Any
 from anki.utils import intTime, joinFields, splitFields, ids2str,\
     checksum
 from anki.lang import _
@@ -43,7 +44,7 @@ defaultModel = {
 """
 }
 
-defaultField = {
+defaultField: Dict[str, Any] = {
     'name': "",
     'ord': None,
     'sticky': False,

anki/sound.py

@@ -5,6 +5,7 @@
 import html
 import re, sys, threading, time, subprocess, os, atexit
 import  random
+from typing import List
 from anki.hooks import addHook, runHook
 from anki.utils import  tmpdir, isWin, isMac, isLin
 from anki.lang import _
@@ -56,15 +57,15 @@ def _packagedCmd(cmd):
 
 processingSrc = "rec.wav"
 processingDst = "rec.mp3"
-processingChain = []
+processingChain: List[List[str]] = []
-recFiles = []
+recFiles: List[str] = []
 
 processingChain = [
     ["lame", processingSrc, processingDst, "--noreplaygain", "--quiet"],
     ]
 
 # don't show box on windows
-if isWin:
+if sys.platform == "win32":
     si = subprocess.STARTUPINFO()
     try:
         si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
@@ -177,7 +178,7 @@ if isWin:
 
     cleanupOldMplayerProcesses()
 
-mplayerQueue = []
+mplayerQueue: List[str] = []
 mplayerManager = None
 mplayerReader = None
 mplayerEvt = threading.Event()
@@ -409,7 +410,7 @@ class PyAudioRecorder(_Recorder):
             return processingSrc
 
 if not pyaudio:
-    PyAudioRecorder = None
+    PyAudioRecorder = None # type: ignore
 
 # Audio interface
 ##########################################################################

mypy.ini

@@ -0,0 +1,23 @@
+[mypy]
+python_version = 3.6
+
+[mypy-win32file]
+ignore_missing_imports = True
+[mypy-win32pipe]
+ignore_missing_imports = True
+[mypy-pywintypes]
+ignore_missing_imports = True
+[mypy-winerror]
+ignore_missing_imports = True
+[mypy-distro]
+ignore_missing_imports = True
+[mypy-pyaudio]
+ignore_missing_imports = True
+[mypy-win32api]
+ignore_missing_imports = True
+[mypy-xml.dom]
+ignore_missing_imports = True
+[mypy-psutil]
+ignore_missing_imports = True
+[mypy-bs4]
+ignore_missing_imports = True

requirements.dev

@@ -0,0 +1,3 @@
+nose
+mypy==0.750
+pylint

requirements.txt

@@ -7,3 +7,4 @@ markdown
 jsonschema
 psutil; sys_platform == "win32"
 distro; sys_platform != "win32" and sys_platform != "darwin"
+typing

tools/typecheck.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+TOOLS="$(cd "`dirname "$0"`"; pwd)"
+mypy $TOOLS/../anki