accept Mapping in Kernel.user_ns instead of dict

accepts FrameLocalsProxy (new in Python 3.13) for embed_kernel

Author: minrk

ipykernel/ipkernel.py

@@ -1,12 +1,15 @@
 """The IPython kernel implementation"""
 
+from __future__ import annotations
+
 import builtins
 import gc
 import getpass
 import os
 import sys
 import threading
 import typing as t
+from collections.abc import Mapping
 from dataclasses import dataclass
 
 import comm
@@ -46,7 +49,7 @@ def _create_comm(*args, **kwargs):
 
 # there can only be one comm manager in a ipykernel process
 _comm_lock = threading.Lock()
-_comm_manager: t.Optional[CommManager] = None
+_comm_manager: CommManager | None = None
 
 
 def _get_comm_manager(*args, **kwargs):
@@ -84,7 +87,7 @@ def _user_module_changed(self, change):
         if self.shell is not None:
             self.shell.user_module = change["new"]
 
-    user_ns = Instance(dict, args=None, allow_none=True)
+    user_ns = Instance(Mapping, args=None, allow_none=True)
 
     @observe("user_ns")
     @observe_compat
@@ -353,7 +356,7 @@ async def do_execute(
 
         self._forward_input(allow_stdin)
 
-        reply_content: t.Dict[str, t.Any] = {}
+        reply_content: dict[str, t.Any] = {}
         if hasattr(shell, "run_cell_async") and hasattr(shell, "should_run_async"):
             run_cell = shell.run_cell_async
             should_run_async = shell.should_run_async
@@ -559,7 +562,7 @@ def do_inspect(self, code, cursor_pos, detail_level=0, omit_sections=()):
         """Handle code inspection."""
         name = token_at_cursor(code, cursor_pos)
 
-        reply_content: t.Dict[str, t.Any] = {"status": "ok"}
+        reply_content: dict[str, t.Any] = {"status": "ok"}
         reply_content["data"] = {}
         reply_content["metadata"] = {}
         assert self.shell is not None
@@ -755,7 +758,7 @@ def init_closure(self: threading.Thread, *args, **kwargs):
         threading.Thread.run = run_closure  # type:ignore[method-assign]
 
     def _clean_thread_parent_frames(
-        self, phase: t.Literal["start", "stop"], info: t.Dict[str, t.Any]
+        self, phase: t.Literal["start", "stop"], info: dict[str, t.Any]
     ):
         """Clean parent frames of threads which are no longer running.
         This is meant to be invoked by garbage collector callback hook.