From 20432ccecf62f34860c99a24732cf6ba6abba6af Mon Sep 17 00:00:00 2001
From: Damien Elmes <gpg@ankiweb.net>
Date: Mon, 31 Aug 2020 12:04:14 +1000
Subject: [PATCH] fix new pylint raise-missing-from lint

---
 pylib/anki/__init__.py | 5 ++---
 pylib/anki/config.py   | 4 ++--
 pylib/anki/decks.py    | 4 ++--
 pylib/anki/media.py    | 4 ++--
 pylib/anki/notes.py    | 4 ++--
 qt/aqt/mpv.py          | 2 ++
 qt/aqt/profiles.py     | 4 ++--
 7 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/pylib/anki/__init__.py b/pylib/anki/__init__.py
index dc86258da..d958c513c 100644
--- a/pylib/anki/__init__.py
+++ b/pylib/anki/__init__.py
@@ -12,8 +12,7 @@ if sys.version_info[0] < 3 or sys.version_info[1] < 7:
 # ensure unicode filenames are supported
 try:
     "テスト".encode(sys.getfilesystemencoding())
-except UnicodeEncodeError:
-    raise Exception("Anki requires a UTF-8 locale.")
-
+except UnicodeEncodeError as exc:
+    raise Exception("Anki requires a UTF-8 locale.") from exc
 
 __all__ = ["Collection"]
diff --git a/pylib/anki/config.py b/pylib/anki/config.py
index 7ae6a98ab..55cfcf585 100644
--- a/pylib/anki/config.py
+++ b/pylib/anki/config.py
@@ -33,8 +33,8 @@ class ConfigManager:
     def get_immutable(self, key: str) -> Any:
         try:
             return from_json_bytes(self.col.backend.get_config_json(key))
-        except NotFoundError:
-            raise KeyError
+        except NotFoundError as exc:
+            raise KeyError from exc
 
     def set(self, key: str, val: Any) -> None:
         self.col.backend.set_config_json(key=key, value_json=to_json_bytes(val))
diff --git a/pylib/anki/decks.py b/pylib/anki/decks.py
index 79adf8512..bdcdfde33 100644
--- a/pylib/anki/decks.py
+++ b/pylib/anki/decks.py
@@ -228,8 +228,8 @@ class DeckManager:
             g["id"] = self.col.backend.add_or_update_deck_legacy(
                 deck=to_json_bytes(g), preserve_usn_and_mtime=preserve_usn
             )
-        except anki.rsbackend.DeckIsFilteredError:
-            raise DeckRenameError("deck was filtered")
+        except anki.rsbackend.DeckIsFilteredError as exc:
+            raise DeckRenameError("deck was filtered") from exc
 
     def rename(self, g: Deck, newName: str) -> None:
         "Rename deck prefix to NAME if not exists. Updates children."
diff --git a/pylib/anki/media.py b/pylib/anki/media.py
index cb3399e74..060dc847d 100644
--- a/pylib/anki/media.py
+++ b/pylib/anki/media.py
@@ -58,8 +58,8 @@ class MediaManager:
             self._oldcwd = None
         try:
             os.chdir(self._dir)
-        except OSError:
-            raise Exception("invalidTempFolder")
+        except OSError as exc:
+            raise Exception("invalidTempFolder") from exc
 
     def __repr__(self) -> str:
         d = dict(self.__dict__)
diff --git a/pylib/anki/notes.py b/pylib/anki/notes.py
index 58d6fca44..0871a761f 100644
--- a/pylib/anki/notes.py
+++ b/pylib/anki/notes.py
@@ -106,8 +106,8 @@ class Note:
     def _fieldOrd(self, key: str) -> Any:
         try:
             return self._fmap[key][0]
-        except:
-            raise KeyError(key)
+        except Exception as exc:
+            raise KeyError(key) from exc
 
     def __getitem__(self, key: str) -> str:
         return self.fields[self._fieldOrd(key)]
diff --git a/qt/aqt/mpv.py b/qt/aqt/mpv.py
index 68349eee0..0ae02ecbd 100644
--- a/qt/aqt/mpv.py
+++ b/qt/aqt/mpv.py
@@ -25,6 +25,8 @@
 #
 # ------------------------------------------------------------------------------
 
+# pylint: disable=raise-missing-from
+
 import inspect
 import json
 import os
diff --git a/qt/aqt/profiles.py b/qt/aqt/profiles.py
index c46d7d628..08a14d250 100644
--- a/qt/aqt/profiles.py
+++ b/qt/aqt/profiles.py
@@ -100,8 +100,8 @@ class ProfileManager:
                 sys.exit(1)
             try:
                 self.load(profile)
-            except TypeError:
-                raise Exception("Provided profile does not exist.")
+            except TypeError as exc:
+                raise Exception("Provided profile does not exist.") from exc
 
     # Base creation
     ######################################################################