more open() and regex strings

anki/collection.py

@@ -840,7 +840,7 @@ and queue = 0""", intTime(), self.usn())
     def _openLog(self):
         if not self._debugLog:
             return
-        lpath = re.sub("\.anki2$", ".log", self.path)
+        lpath = re.sub(r"\.anki2$", ".log", self.path)
         if os.path.exists(lpath) and os.path.getsize(lpath) > 10*1024*1024:
             lpath2 = lpath + ".old"
             if os.path.exists(lpath2):
@@ -849,6 +849,7 @@ and queue = 0""", intTime(), self.usn())
         self._logHnd = open(lpath, "a", encoding="utf8")
 
     def _closeLog(self):
+        self._logHnd.close()
         self._logHnd = None
 
     # Card Flags

aqt/addons.py

@@ -39,7 +39,7 @@ class AddonManager:
 
     def managedAddons(self):
         return [d for d in self.allAddons()
-                if re.match("^\d+$", d)]
+                if re.match(r"^\d+$", d)]
 
     def addonsFolder(self, dir=None):
         root = self.mw.pm.addonFolder()
@@ -76,13 +76,15 @@ When loading '%(name)s':
     def addonMeta(self, dir):
         path = self._addonMetaPath(dir)
         try:
-            return json.load(open(path, encoding="utf8"))
+            with open(path, encoding="utf8") as f:
+                return json.load(f)
         except:
             return dict()
 
     def writeAddonMeta(self, dir, meta):
         path = self._addonMetaPath(dir)
-        json.dump(meta, open(path, "w", encoding="utf8"))
+        with open(path, "w", encoding="utf8") as f:
+            json.dump(meta, f)
 
     def toggleEnabled(self, dir):
         meta = self.addonMeta(dir)
@@ -203,14 +205,16 @@ When loading '%(name)s':
     def addonConfigDefaults(self, dir):
         path = os.path.join(self.addonsFolder(dir), "config.json")
         try:
-            return json.load(open(path, encoding="utf8"))
+            with open(path, encoding="utf8") as f:
+                return json.load(f)
         except:
             return None
 
     def addonConfigHelp(self, dir):
         path = os.path.join(self.addonsFolder(dir), "config.md")
         if os.path.exists(path):
-            return markdown.markdown(open(path).read())
+            with open(path) as f:
+                return markdown.markdown(f.read())
         else:
             return ""
 
@@ -325,7 +329,7 @@ class AddonsDialog(QDialog):
         addon = self.onlyOneSelected()
         if not addon:
             return
-        if re.match("^\d+$", addon):
+        if re.match(r"^\d+$", addon):
             openLink(aqt.appShared + f"info/{addon}")
         else:
             showWarning(_("Add-on was not downloaded from AnkiWeb."))

aqt/main.py

@@ -405,7 +405,8 @@ from the profile screen."))
         # do backup
         fname = time.strftime("backup-%Y-%m-%d-%H.%M.%S.colpkg", time.localtime(time.time()))
         newpath = os.path.join(dir, fname)
-        data = open(path, "rb").read()
+        with open(path, "rb") as f:
+            data = f.read()
         b = self.BackupThread(newpath, data)
         b.start()
 
@@ -413,7 +414,7 @@ from the profile screen."))
         backups = []
         for file in os.listdir(dir):
             # only look for new-style format
-            m = re.match("backup-\d{4}-\d{2}-.+.colpkg", file)
+            m = re.match(r"backup-\d{4}-\d{2}-.+.colpkg", file)
             if not m:
                 continue
             backups.append(file)
@@ -1170,7 +1171,7 @@ will be lost. Continue?"""))
         tgt = tgt or self
         for action in tgt.findChildren(QAction):
             txt = str(action.text())
-            m = re.match("^(.+)\(&.+\)(.+)?", txt)
+            m = re.match(r"^(.+)\(&.+\)(.+)?", txt)
             if m:
                 action.setText(m.group(1) + (m.group(2) or ""))