Run Mypy by default.

Otherwise the types annotations are less usefull, even with ruff.

Ignore/fix types errors.

.pre-commit-config.yaml

@@ -40,11 +40,10 @@ repos:
         types_or: [yaml, html, json]
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: "v1.8.0"
+    rev: "v1.11.0"
     hooks:
       - id: mypy
         files: ipykernel
-        stages: [manual]
         args: ["--install-types", "--non-interactive"]
         additional_dependencies:
           [

ipykernel/inprocess/blocking.py

@@ -68,6 +68,7 @@ def call_handlers(self, msg):
             _raw_input = self.client.kernel._sys_raw_input
             prompt = msg["content"]["prompt"]
             print(prompt, end="", file=sys.__stdout__)
+            assert sys.__stdout__ is not None
             sys.__stdout__.flush()
             self.client.input(_raw_input())
 

ipykernel/inprocess/client.py

@@ -55,7 +55,7 @@ def _default_blocking_class(self):
 
         return BlockingInProcessKernelClient
 
-    def get_connection_info(self):
+    def get_connection_info(self):  # type: ignore[override]
         """Get the connection info for the client."""
         d = super().get_connection_info()
         d["kernel"] = self.kernel  # type:ignore[assignment]
@@ -100,8 +100,13 @@ def hb_channel(self):
     # Methods for sending specific messages
     # -------------------------------------
 
-    async def execute(
-        self, code, silent=False, store_history=True, user_expressions=None, allow_stdin=None
+    async def execute(  # type: ignore[override]
+        self,
+        code,
+        silent=False,
+        store_history=True,
+        user_expressions=None,
+        allow_stdin=None,
     ):
         """Execute code on the client."""
         if allow_stdin is None:

ipykernel/inprocess/session.py

@@ -2,7 +2,7 @@
 
 
 class Session(_Session):
-    async def recv(self, socket, copy=True):
+    async def recv(self, socket, copy=True):  # type: ignore [override]
         return await socket.recv_multipart()
 
     def send(

ipykernel/kernelapp.py

@@ -261,7 +261,7 @@ def _bind_socket(self, s, port):
                     raise
         return None
 
-    def write_connection_file(self):
+    def write_connection_file(self):  # type: ignore[override]
         """write connection info to JSON file"""
         cf = self.abs_connection_file
         connection_info = dict(

ipykernel/kernelbase.py

@@ -233,6 +233,14 @@ def _parent_header(self):
     ]
 
     _eventloop_set: Event = Event()
+    control_handlers: Dict[
+        str,
+        t.Callable[[zmq.asyncio.Socket, list[bytes], str], t.Awaitable[t.Any]]
+        |
+        # I think this one should be deprecated, and we should check the handlers are
+        # coroutine functions.
+        t.Callable[[zmq.asyncio.Socket, list[bytes], str], t.Any],
+    ]
 
     def __init__(self, **kwargs):
         """Initialize the kernel."""

ipykernel/zmqshell.py

@@ -78,7 +78,7 @@ def _hooks(self):
             self._thread_local.hooks = []
         return self._thread_local.hooks
 
-    def publish(
+    def publish(  # type:ignore[override]
         self,
         data,
         metadata=None,
@@ -516,7 +516,7 @@ def _update_exit_now(self, change):
 
     # Over ZeroMQ, GUI control isn't done with PyOS_InputHook as there is no
     # interactive input being read; we provide event loop support in ipkernel
-    def enable_gui(self, gui):
+    def enable_gui(self, gui):  # type:ignore[override]
         """Enable a given guil."""
         from .eventloops import enable_gui as real_enable_gui
 
@@ -635,11 +635,13 @@ def set_parent(self, parent):
         if hasattr(self, "_data_pub"):
             self.data_pub.set_parent(parent)
         try:
-            sys.stdout.set_parent(parent)  # type:ignore[attr-defined]
+            stdout = sys.stdout
+            stdout.set_parent(parent)  # type:ignore[union-attr]
         except AttributeError:
             pass
         try:
-            sys.stderr.set_parent(parent)  # type:ignore[attr-defined]
+            stderr = sys.stderr
+            stderr.set_parent(parent)  # type:ignore[union-attr]
         except AttributeError:
             pass