Fix some inconsistent returns

qutebrowser/browser/downloads.py

@@ -103,6 +103,8 @@ def immediate_download_path(prompt_download_directory=None):
     if not prompt_download_directory:
         return download_dir()
 
+    return None
+
 
 def _path_suggestion(filename):
     """Get the suggested file path.

qutebrowser/browser/qtnetworkdownloads.py

@@ -303,8 +303,7 @@ class DownloadItem(downloads.AbstractDownloadItem):
         """Handle QNetworkReply errors."""
         if code == QNetworkReply.OperationCanceledError:
             return
-        else:
-            self._die(self._reply.errorString())
+        self._die(self._reply.errorString())
 
     @pyqtSlot()
     def _on_read_timer_timeout(self):
@@ -399,7 +398,7 @@ class DownloadManager(downloads.AbstractDownloadManager):
         """
         if not url.isValid():
             urlutils.invalid_url_error(url, "start download")
-            return
+            return None
         req = QNetworkRequest(url)
         if user_agent is not None:
             req.setHeader(QNetworkRequest.UserAgentHeader, user_agent)

qutebrowser/browser/webkit/network/filescheme.py

@@ -132,5 +132,6 @@ class FileSchemeHandler(schemehandler.SchemeHandler):
                 data = dirbrowser_html(path)
                 return networkreply.FixedDataNetworkReply(
                     request, data, 'text/html', self.parent())
+            return None
         except UnicodeEncodeError:
             return None

qutebrowser/browser/webkit/rfc6266.py

@@ -270,6 +270,7 @@ class _ContentDisposition:
         elif 'filename' in self.assocs:
             # XXX Reject non-ascii (parsed via qdtext) here?
             return self.assocs['filename']
+        return None
 
     def is_inline(self):
         """Return if the file should be handled inline.

qutebrowser/commands/command.py

@@ -190,6 +190,7 @@ class Command:
             return True
         elif arg_info.win_id:
             return True
+        return False
 
     def _inspect_func(self):
         """Inspect the function to get useful informations from it.

qutebrowser/config/config.py

@@ -107,12 +107,14 @@ class change_filter:  # noqa: N801,N806 pylint: disable=invalid-name
                 """Call the underlying function."""
                 if self._check_match(option):
                     return func()
+                return None
         else:
             @functools.wraps(func)
             def wrapper(wrapper_self, option=None):
                 """Call the underlying function."""
                 if self._check_match(option):
                     return func(wrapper_self)
+                return None
 
         return wrapper
 
@@ -463,7 +465,8 @@ class ConfigContainer:
     def __setattr__(self, attr, value):
         """Set the given option in the config."""
         if attr.startswith('_'):
-            return super().__setattr__(attr, value)
+            super().__setattr__(attr, value)
+            return
 
         name = self._join(attr)
         with self._handle_error('setting', name):

qutebrowser/config/configfiles.py

@@ -136,7 +136,7 @@ class YamlConfig(QObject):
             with open(self._filename, 'r', encoding='utf-8') as f:
                 yaml_data = utils.yaml_load(f)
         except FileNotFoundError:
-            return {}
+            return
         except OSError as e:
             desc = configexc.ConfigErrorDesc("While reading", e)
             raise configexc.ConfigFileErrors('autoconfig.yml', [desc])

qutebrowser/keyinput/modeparsers.py

@@ -218,7 +218,7 @@ class HintKeyParser(keyparser.CommandKeyParser):
             self._last_press = LastPress.none
             return True
         elif match == self.Match.other:
-            pass
+            return None
         elif match == self.Match.none:
             # We couldn't find a keychain so we check if it's a special key.
             return self._handle_special_key(e)

qutebrowser/mainwindow/prompt.py

@@ -171,7 +171,7 @@ class PromptQueue(QObject):
             # just queue it up for later.
             log.prompt.debug("Adding {} to queue.".format(question))
             self._queue.append(question)
-            return
+            return None
 
         if blocking:
             # If we're blocking we save the old question on the stack, so we
@@ -207,6 +207,7 @@ class PromptQueue(QObject):
             return question.answer
         else:
             question.completed.connect(self._pop_later)
+            return None
 
     @pyqtSlot(usertypes.KeyMode)
     def _on_mode_left(self, mode):

qutebrowser/misc/sessions.py

@@ -291,7 +291,7 @@ class SessionManager(QObject):
             data = self._last_window_session
             if data is None:
                 log.sessions.error("last_window_session is None while saving!")
-                return
+                return None
         else:
             data = self._save_all(only_window=only_window,
                                   with_private=with_private)