mypy: Set local_partial_types = True

This is going to be default behavior in mypy 2.0, see:

- #8123
- https://mypy-lang.blogspot.com/2024/03/mypy-19-released.html
- https://mypy.readthedocs.io/en/stable/command_line.html#cmdoption-mypy-local-partial-types

21 files changed, 33 insertions, 27 deletions

diff --git a/.mypy.ini b/.mypy.ini
index ef34dbada..e987da336 100644
--- a/.mypy.ini
+++ b/.mypy.ini
@@ -29,6 +29,9 @@ pretty = True
 ### FIXME:v4 get rid of this
 no_implicit_optional = False
 
+### Future default behavior
+local_partial_types = True
+
 [mypy-hunter]
 # https://github.com/ionelmc/python-hunter/issues/43
 ignore_missing_imports = True
diff --git a/qutebrowser/browser/network/proxy.py b/qutebrowser/browser/network/proxy.py
index f0c511853..62872d68e 100644
--- a/qutebrowser/browser/network/proxy.py
+++ b/qutebrowser/browser/network/proxy.py
@@ -4,6 +4,8 @@
 
 """Handling of proxies."""
 
+from typing import Optional
+
 from qutebrowser.qt.core import QUrl, pyqtSlot
 from qutebrowser.qt.network import QNetworkProxy, QNetworkProxyFactory
 
@@ -13,7 +15,7 @@ from qutebrowser.misc import objects
 from qutebrowser.browser.network import pac
 
 
-application_factory = None
+application_factory: Optional["ProxyFactory"] = None
 
 
 def init():
diff --git a/qutebrowser/browser/qutescheme.py b/qutebrowser/browser/qutescheme.py
index f325ff9e3..508d510d7 100644
--- a/qutebrowser/browser/qutescheme.py
+++ b/qutebrowser/browser/qutescheme.py
@@ -32,10 +32,10 @@ from qutebrowser.qt import sip
 
 
 pyeval_output = ":pyeval was never called"
-csrf_token = None
+csrf_token: Optional[str] = None
 
 
-_HANDLERS = {}
+_HANDLERS: Dict[str, "_HandlerCallable"] = {}
 
 
 class Error(Exception):
diff --git a/qutebrowser/browser/webengine/webenginesettings.py b/qutebrowser/browser/webengine/webenginesettings.py
index 2b375a7b0..78a4946ad 100644
--- a/qutebrowser/browser/webengine/webenginesettings.py
+++ b/qutebrowser/browser/webengine/webenginesettings.py
@@ -37,7 +37,7 @@ private_profile: Optional[QWebEngineProfile] = None
 # The global WebEngineSettings object
 _global_settings = cast('WebEngineSettings', None)
 
-parsed_user_agent = None
+parsed_user_agent: Optional[websettings.UserAgent] = None
 
 _qute_scheme_handler = cast(webenginequtescheme.QuteSchemeHandler, None)
 _req_interceptor = cast('interceptor.RequestInterceptor', None)
diff --git a/qutebrowser/commands/runners.py b/qutebrowser/commands/runners.py
index 1ad563c5d..0d63d0021 100644
--- a/qutebrowser/commands/runners.py
+++ b/qutebrowser/commands/runners.py
@@ -7,7 +7,7 @@
 import traceback
 import re
 import contextlib
-from typing import TYPE_CHECKING, Callable, Dict, Iterator, Mapping, MutableMapping
+from typing import TYPE_CHECKING, Callable, Dict, Tuple, Iterator, Mapping, MutableMapping
 
 from qutebrowser.qt.core import pyqtSlot, QUrl, QObject
 
@@ -21,7 +21,7 @@ if TYPE_CHECKING:
 _ReplacementFunction = Callable[['tabbedbrowser.TabbedBrowser'], str]
 
 
-last_command = {}
+last_command: Dict[usertypes.KeyMode, Tuple[str, int]] = {}
 
 
 def _url(tabbed_browser):
diff --git a/qutebrowser/config/config.py b/qutebrowser/config/config.py
index 573f25fa1..cb7fe77b3 100644
--- a/qutebrowser/config/config.py
+++ b/qutebrowser/config/config.py
@@ -29,7 +29,7 @@ key_instance = cast('KeyConfig', None)
 cache = cast('configcache.ConfigCache', None)
 
 # Keeping track of all change filters to validate them later.
-change_filters = []
+change_filters: List["change_filter"] = []
 
 # Sentinel
 UNSET = object()
diff --git a/qutebrowser/config/configinit.py b/qutebrowser/config/configinit.py
index 5d000c3ec..a08ddb619 100644
--- a/qutebrowser/config/configinit.py
+++ b/qutebrowser/config/configinit.py
@@ -7,6 +7,7 @@
 import argparse
 import os.path
 import sys
+from typing import Optional
 
 from qutebrowser.qt.widgets import QMessageBox
 
@@ -19,7 +20,7 @@ from qutebrowser.misc import msgbox, objects, savemanager
 
 
 # Error which happened during init, so we can show a message box.
-_init_errors = None
+_init_errors: Optional[configexc.ConfigFileErrors] = None
 
 
 def early_init(args: argparse.Namespace) -> None:
diff --git a/qutebrowser/config/websettings.py b/qutebrowser/config/websettings.py
index 9f5bf92d0..7824ae258 100644
--- a/qutebrowser/config/websettings.py
+++ b/qutebrowser/config/websettings.py
@@ -246,7 +246,7 @@ def clear_private_data() -> None:
     elif objects.backend == usertypes.Backend.QtWebKit:
         from qutebrowser.browser.webkit import cookies
         assert cookies.ram_cookie_jar is not None
-        cookies.ram_cookie_jar.setAllCookies([])  # type: ignore[unreachable]
+        cookies.ram_cookie_jar.setAllCookies([])
     else:
         raise utils.Unreachable(objects.backend)
 
diff --git a/qutebrowser/extensions/loader.py b/qutebrowser/extensions/loader.py
index b5b232c5a..ff9974d9d 100644
--- a/qutebrowser/extensions/loader.py
+++ b/qutebrowser/extensions/loader.py
@@ -21,7 +21,7 @@ from qutebrowser.misc import objects
 
 
 # ModuleInfo objects for all loaded plugins
-_module_infos = []
+_module_infos: List["ModuleInfo"] = []
 
 InitHookType = Callable[['InitContext'], None]
 ConfigChangedHookType = Callable[[], None]
diff --git a/qutebrowser/keyinput/keyutils.py b/qutebrowser/keyinput/keyutils.py
index af19bb61c..54b6e88b1 100644
--- a/qutebrowser/keyinput/keyutils.py
+++ b/qutebrowser/keyinput/keyutils.py
@@ -26,7 +26,7 @@ from qutebrowser.qt.gui import QKeySequence, QKeyEvent
 if machinery.IS_QT6:
     from qutebrowser.qt.core import QKeyCombination
 else:
-    QKeyCombination = None  # QKeyCombination was added in Qt 6
+    QKeyCombination: None = None  # QKeyCombination was added in Qt 6
 
 from qutebrowser.utils import utils, qtutils, debug
 
diff --git a/qutebrowser/misc/consolewidget.py b/qutebrowser/misc/consolewidget.py
index b489aaf36..08f5dc5ff 100644
--- a/qutebrowser/misc/consolewidget.py
+++ b/qutebrowser/misc/consolewidget.py
@@ -6,7 +6,7 @@
 
 import sys
 import code
-from typing import MutableSequence
+from typing import MutableSequence, Optional
 
 from qutebrowser.qt.core import pyqtSignal, pyqtSlot, Qt
 from qutebrowser.qt.widgets import QTextEdit, QWidget, QVBoxLayout, QApplication
@@ -17,7 +17,7 @@ from qutebrowser.misc import cmdhistory, miscwidgets
 from qutebrowser.utils import utils, objreg
 
 
-console_widget = None
+console_widget: Optional["ConsoleWidget"] = None
 
 
 class ConsoleLineEdit(miscwidgets.CommandLineEdit):
diff --git a/qutebrowser/misc/ipc.py b/qutebrowser/misc/ipc.py
index 2dc34c886..21a3352d6 100644
--- a/qutebrowser/misc/ipc.py
+++ b/qutebrowser/misc/ipc.py
@@ -28,7 +28,7 @@ PROTOCOL_VERSION = 1
 
 
 # The ipc server instance
-server = None
+server: Optional["IPCServer"] = None
 
 
 def _get_socketname_windows(basedir):
diff --git a/qutebrowser/misc/nativeeventfilter.py b/qutebrowser/misc/nativeeventfilter.py
index 9b1bbb97c..06533bd42 100644
--- a/qutebrowser/misc/nativeeventfilter.py
+++ b/qutebrowser/misc/nativeeventfilter.py
@@ -20,7 +20,7 @@ from qutebrowser.utils import log
 
 
 # Needs to be saved to avoid garbage collection
-_instance = None
+_instance: Optional["NativeEventFilter"] = None
 
 # Using C-style naming for C structures in this file
 # pylint: disable=invalid-name
diff --git a/qutebrowser/qt/machinery.py b/qutebrowser/qt/machinery.py
index 616c7ccfc..f9e3721f8 100644
--- a/qutebrowser/qt/machinery.py
+++ b/qutebrowser/qt/machinery.py
@@ -34,7 +34,7 @@ from qutebrowser.utils import log
 # sed -i 's/_WRAPPER_OVERRIDE = .*/_WRAPPER_OVERRIDE = "PyQt6"/' qutebrowser/qt/machinery.py
 #
 # Users: Set the QUTE_QT_WRAPPER environment variable to change the default wrapper.
-_WRAPPER_OVERRIDE = None
+_WRAPPER_OVERRIDE = None  # type: ignore[var-annotated]
 
 WRAPPERS = [
     "PyQt6",
@@ -190,7 +190,7 @@ def _select_wrapper(args: Optional[argparse.Namespace]) -> SelectionInfo:
         return SelectionInfo(wrapper=env_wrapper, reason=SelectionReason.env)
 
     if _WRAPPER_OVERRIDE is not None:
-        assert _WRAPPER_OVERRIDE in WRAPPERS  # type: ignore[unreachable]
+        assert _WRAPPER_OVERRIDE in WRAPPERS
         return SelectionInfo(wrapper=_WRAPPER_OVERRIDE, reason=SelectionReason.override)
 
     return _autoselect_wrapper()
diff --git a/qutebrowser/utils/log.py b/qutebrowser/utils/log.py
index 3e3b407b0..9695ec5a2 100644
--- a/qutebrowser/utils/log.py
+++ b/qutebrowser/utils/log.py
@@ -31,7 +31,7 @@ if TYPE_CHECKING:
     from qutebrowser.config import config as configmodule
 
 _log_inited = False
-_args = None
+_args: Optional[argparse.Namespace] = None
 
 COLORS = ['black', 'red', 'green', 'yellow', 'blue', 'purple', 'cyan', 'white']
 COLOR_ESCAPES = {color: '\033[{}m'.format(i)
@@ -146,7 +146,7 @@ LOGGER_NAMES = [
 
 ram_handler: Optional['RAMHandler'] = None
 console_handler: Optional[logging.Handler] = None
-console_filter = None
+console_filter: Optional["LogFilter"] = None
 
 
 def stub(suffix: str = '') -> None:
diff --git a/qutebrowser/utils/qtlog.py b/qutebrowser/utils/qtlog.py
index 1de9181cf..78b48ebee 100644
--- a/qutebrowser/utils/qtlog.py
+++ b/qutebrowser/utils/qtlog.py
@@ -15,7 +15,7 @@ from typing import Iterator, Optional
 from qutebrowser.qt import core as qtcore
 from qutebrowser.utils import log
 
-_args = None
+_args: Optional[argparse.Namespace] = None
 
 
 def init(args: argparse.Namespace) -> None:
diff --git a/qutebrowser/utils/qtutils.py b/qutebrowser/utils/qtutils.py
index 89175ca4e..12c98cc1d 100644
--- a/qutebrowser/utils/qtutils.py
+++ b/qutebrowser/utils/qtutils.py
@@ -736,4 +736,4 @@ else:
     def add_optional(obj: Optional[_T]) -> Optional[_T]:
         return obj
 
-    QT_NONE = None
+    QT_NONE: None = None
diff --git a/qutebrowser/utils/resources.py b/qutebrowser/utils/resources.py
index 60d90fd31..a40f9d2bd 100644
--- a/qutebrowser/utils/resources.py
+++ b/qutebrowser/utils/resources.py
@@ -9,7 +9,7 @@ import sys
 import contextlib
 import posixpath
 import pathlib
-from typing import Iterator, Iterable, Union
+from typing import Iterator, Iterable, Union, Dict
 
 
 # We cannot use the stdlib version on 3.8 because we need the files() API.
@@ -25,7 +25,7 @@ else:  # pragma: no cover
     from importlib_resources.abc import Traversable
 
 import qutebrowser
-_cache = {}
+_cache: Dict[str, str] = {}
 
 
 _ResourceType = Union[Traversable, pathlib.Path]
diff --git a/qutebrowser/utils/standarddir.py b/qutebrowser/utils/standarddir.py
index 2d2ae53f9..026376dc2 100644
--- a/qutebrowser/utils/standarddir.py
+++ b/qutebrowser/utils/standarddir.py
@@ -10,7 +10,7 @@ import sys
 import contextlib
 import enum
 import argparse
-from typing import Iterator, Optional
+from typing import Iterator, Optional, Dict
 
 from qutebrowser.qt.core import QStandardPaths
 from qutebrowser.qt.widgets import QApplication
@@ -18,7 +18,7 @@ from qutebrowser.qt.widgets import QApplication
 from qutebrowser.utils import log, debug, utils, version, qtutils
 
 # The cached locations
-_locations = {}
+_locations: Dict["_Location", str] = {}
 
 
 class _Location(enum.Enum):
diff --git a/qutebrowser/utils/utils.py b/qutebrowser/utils/utils.py
index a9de4bc00..11c160c9e 100644
--- a/qutebrowser/utils/utils.py
+++ b/qutebrowser/utils/utils.py
@@ -38,7 +38,7 @@ except ImportError:  # pragma: no cover
 
 from qutebrowser.utils import log
 
-fake_clipboard = None
+fake_clipboard: Optional[str] = None
 log_clipboard = False
 
 is_mac = sys.platform.startswith('darwin')
diff --git a/qutebrowser/utils/version.py b/qutebrowser/utils/version.py
index 59da5b5f0..58772b3db 100644
--- a/qutebrowser/utils/version.py
+++ b/qutebrowser/utils/version.py
@@ -78,7 +78,7 @@ class DistributionInfo:
     pretty: str
 
 
-pastebin_url = None
+pastebin_url: Optional[str] = None
 
 
 class Distribution(enum.Enum):