Add version guards

IPython/core/guarded_eval.py

@@ -14,10 +14,6 from typing import (
     get_args,
     get_origin,
 )
-from typing_extensions import (
-    Self,  # Python >=3.10
-    TypeAliasType,  # Python >=3.12
-)
 import ast
 import builtins
 import collections
@@ -27,10 +23,20 from functools import cached_property
 from dataclasses import dataclass, field
 from types import MethodDescriptorType, ModuleType
 
-
 from IPython.utils.decorators import undoc
 
 
+if sys.version_info < (3, 11):
+    from typing_extensions import Self
+else:
+    from typing import Self
+
+if sys.version_info < (3, 12):
+    from typing_extensions import TypeAliasType
+else:
+    from typing import TypeAliasType
+
+
 @undoc
 class HasGetItem(Protocol):
     def __getitem__(self, key) -> None:

IPython/core/tests/test_guarded_eval.py

@@ -1,3 +1,4
+import sys
 from contextlib import contextmanager
 from typing import NamedTuple, Literal, NewType
 from functools import partial
@@ -7,14 +8,21 from IPython.core.guarded_eval import (
     guarded_eval,
     _unbind_method,
 )
-from typing_extensions import (
-    Self,  # Python >=3.10
-    TypeAliasType,  # Python >=3.12
-)
 from IPython.testing import decorators as dec
 import pytest
 
 
+if sys.version_info < (3, 11):
+    from typing_extensions import Self
+else:
+    from typing import Self
+
+if sys.version_info < (3, 12):
+    from typing_extensions import TypeAliasType
+else:
+    from typing import TypeAliasType
+
+
 def create_context(evaluation: str, **kwargs):
     return EvaluationContext(locals=kwargs, globals={}, evaluation=evaluation)