Annotate the news items that are trigered by autotyping.

And move most `__init__` declaration to class level + default value when
immutable.

Author: Carreau

ipykernel/debugger.py

@@ -81,12 +81,13 @@ def __init__(self) -> None:
 class VariableExplorer:
     """A variable explorer."""
 
+    frame: _FakeFrame | None = None
+
     def __init__(self) -> None:
         """Initialize the explorer."""
         self.suspended_frame_manager = SuspendedFramesManager()
         self.py_db = _DummyPyDB()
         self.tracker = _FramesTracker(self.suspended_frame_manager, self.py_db)
-        self.frame = None
 
     def track(self) -> None:
         """Start tracking."""
@@ -307,6 +308,10 @@ async def send_dap_request(self, msg):
 class Debugger:
     """The debugger class."""
 
+    breakpoint_list: dict[str, t.Any]
+    stopped_threads: set[int]
+    _removed_cleanup: dict[int, t.Any]
+
     # Requests that requires that the debugger has started
     started_debug_msg_types = [
         "dumpCell",

ipykernel/displayhook.py

@@ -23,12 +23,15 @@ class ZMQDisplayHook:
 
     topic = b"execute_result"
 
+    _parent_header: ContextVar[dict[str, Any]]
+    _parent_header_global: dict[str, t.Any]
+
     def __init__(self, session, pub_socket) -> None:
         """Initialize the hook."""
         self.session = session
         self.pub_socket = pub_socket
 
-        self._parent_header: ContextVar[dict[str, Any]] = ContextVar("parent_header")
+        self._parent_header = ContextVar("parent_header")
         self._parent_header.set({})
         self._parent_header_global = {}
 
@@ -92,6 +95,7 @@ class ZMQShellDisplayHook(DisplayHook):
     session = Instance(Session, allow_none=True)
     pub_socket = Any(allow_none=True)
     _parent_header: ContextVar[dict[str, Any]]
+    _parent_header_global: dict[str, t.Any]
     _thread_local = Any()
     msg: dict[str, t.Any] | None
 

ipykernel/gui/gtk3embed.py

@@ -12,6 +12,8 @@
 # stdlib
 import sys
 import warnings
+from collections.abc import Callable
+from typing import Any
 
 # Third-party
 import gi
@@ -32,12 +34,13 @@
 class GTKEmbed:
     """A class to embed a kernel into the GTK main event loop."""
 
+    # These two will later store the real gtk functions when we hijack them
+    gtk_main = None
+    gtk_main_quit: Callable[..., Any] | None = None
+
     def __init__(self, kernel) -> None:
         """Initialize the embed."""
         self.kernel = kernel
-        # These two will later store the real gtk functions when we hijack them
-        self.gtk_main = None
-        self.gtk_main_quit = None
 
     def start(self) -> None:
         """Starts the GTK main event loop and sets our kernel startup routine."""

ipykernel/gui/gtkembed.py

@@ -12,6 +12,8 @@
 # stdlib
 import sys
 import warnings
+from collections.abc import Callable
+from typing import Any
 
 # Third-party
 import gobject
@@ -29,12 +31,13 @@
 class GTKEmbed:
     """A class to embed a kernel into the GTK main event loop."""
 
+    # These two will later store the real gtk functions when we hijack them
+    gtk_main = None
+    gtk_main_quit: Callable[..., Any] | None = None
+
     def __init__(self, kernel) -> None:
         """Initialize the embed."""
         self.kernel = kernel
-        # These two will later store the real gtk functions when we hijack them
-        self.gtk_main = None
-        self.gtk_main_quit = None
 
     def start(self) -> None:
         """Starts the GTK main event loop and sets our kernel startup routine."""

ipykernel/iostream.py

@@ -448,6 +448,9 @@ class OutStream(TextIOBase):
     topic = None
     encoding = "UTF-8"
     _exc: Any | None = None
+    _parent_header: contextvars.ContextVar[dict[str, Any]]
+    _parent_header_global: dict[str, Any]
+    _buffers: defaultdict[frozenset[tuple[str, Any]], StringIO]
 
     def fileno(self):
         """
@@ -539,9 +542,7 @@ def __init__(
         self.pub_thread = pub_thread
         self.name = name
         self.topic = b"stream." + name.encode()
-        self._parent_header: contextvars.ContextVar[dict[str, Any]] = contextvars.ContextVar(
-            "parent_header"
-        )
+        self._parent_header = contextvars.ContextVar("parent_header")
         self._parent_header.set({})
         self._parent_header_global = {}
         self._master_pid = os.getpid()

ipykernel/trio_runner.py

@@ -13,10 +13,8 @@
 class TrioRunner:
     """A trio loop runner."""
 
-    def __init__(self) -> None:
-        """Initialize the runner."""
-        self._cell_cancel_scope = None
-        self._trio_token = None
+    _cell_cancel_scope: trio.CancelScope | None = None
+    _trio_token: trio.lowlevel.TrioToken | None = None
 
     def initialize(self, kernel, io_loop) -> None:
         """Initialize the runner."""

ipykernel/zmqshell.py

@@ -58,6 +58,7 @@ class ZMQDisplayPublisher(DisplayPublisher):
     session = Instance(Session, allow_none=True)
     pub_socket = Any(allow_none=True)
     _parent_header: contextvars.ContextVar[dict[str, Any]]
+    _parent_header_global: dict[str, Any]
     topic = CBytes(b"display_data")
 
     store_display_history = Bool(
@@ -526,6 +527,9 @@ def subshell(self, arg_s):
 class ZMQInteractiveShell(InteractiveShell):
     """A subclass of InteractiveShell for ZMQ."""
 
+    _parent_header: contextvars.ContextVar[dict[str, typing.Any]]
+    _parent_header_global: dict[str, typing.Any]
+
     def __init__(self, *args, **kwargs) -> None:
         super().__init__(*args, **kwargs)
 
@@ -546,9 +550,7 @@ def __init__(self, *args, **kwargs) -> None:
         if "IPKernelApp" not in self.config:
             self.config.IPKernelApp.tqdm = "dummy value for https://github.com/tqdm/tqdm/pull/1628"
 
-        self._parent_header: contextvars.ContextVar[dict[str, typing.Any]] = contextvars.ContextVar(
-            "parent_header"
-        )
+        self._parent_header = contextvars.ContextVar("parent_header")
         self._parent_header.set({})
         self._parent_header_global = {}
 

pyproject.toml

@@ -128,7 +128,7 @@ build = [
 [tool.mypy]
 files = "ipykernel"
 strict = true
-disable_error_code = ["no-untyped-def", "no-untyped-call", "import-not-found"]
+disable_error_code = ["no-untyped-def", "no-untyped-call", "import-not-found", "untyped-decorator"]
 enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
 follow_imports = "normal"
 pretty = true