Refactor: migrate imports from typing_extensions to typing

Author: guilhermesenko

mypy/checker.py

@@ -18,7 +18,8 @@
     cast,
     overload,
 )
-from typing_extensions import TypeAlias as _TypeAlias, TypeGuard
+from typing import TypeGuard
+from typing_extensions import TypeAlias
 
 import mypy.checkexpr
 from mypy import errorcodes as codes, join, message_registry, nodes, operators

mypy/checkexpr.py

@@ -9,7 +9,8 @@
 from collections.abc import Iterable, Iterator, Sequence
 from contextlib import contextmanager, nullcontext
 from typing import Callable, ClassVar, Final, Optional, cast, overload
-from typing_extensions import TypeAlias as _TypeAlias, assert_never
+from typing import assert_never
+from typing_extensions import TypeAlias
 
 import mypy.checker
 import mypy.errorcodes as codes

mypy/config_parser.py

@@ -15,7 +15,8 @@
 
 from collections.abc import Mapping, MutableMapping, Sequence
 from typing import Any, Callable, Final, TextIO, Union
-from typing_extensions import Never, TypeAlias
+from typing import Never
+from typing_extensions import TypeAlias
 
 from mypy import defaults
 from mypy.options import PER_MODULE_OPTIONS, Options

mypy/constraints.py

@@ -4,7 +4,7 @@
 
 from collections.abc import Iterable, Sequence
 from typing import TYPE_CHECKING, Final, cast
-from typing_extensions import TypeGuard
+from typing import TypeGuard
 
 import mypy.subtypes
 import mypy.typeops

mypy/errors.py

@@ -7,7 +7,8 @@
 from collections.abc import Iterable, Iterator
 from itertools import chain
 from typing import Callable, Final, NoReturn, Optional, TextIO, TypeVar
-from typing_extensions import Literal, Self, TypeAlias as _TypeAlias
+from typing import Literal
+from typing_extensions import Self, TypeAlias
 
 from mypy import errorcodes as codes
 from mypy.error_formatter import ErrorFormatter

mypy/nodes.py

@@ -9,7 +9,8 @@
 from collections.abc import Iterator, Sequence
 from enum import Enum, unique
 from typing import TYPE_CHECKING, Any, Callable, Final, Optional, TypeVar, Union, cast
-from typing_extensions import TypeAlias as _TypeAlias, TypeGuard
+from typing import TypeGuard
+from typing_extensions import TypeAlias
 
 from mypy_extensions import trait
 

mypy/semanal.py

@@ -53,7 +53,8 @@
 from collections.abc import Collection, Iterable, Iterator
 from contextlib import contextmanager
 from typing import Any, Callable, Final, TypeVar, cast
-from typing_extensions import TypeAlias as _TypeAlias, TypeGuard
+from typing import TypeGuard
+from typing_extensions import TypeAlias
 
 from mypy import errorcodes as codes, message_registry
 from mypy.constant_fold import constant_fold_expr

mypy/types.py

@@ -6,7 +6,8 @@
 from abc import abstractmethod
 from collections.abc import Iterable, Sequence
 from typing import TYPE_CHECKING, Any, ClassVar, Final, NewType, TypeVar, Union, cast, overload
-from typing_extensions import Self, TypeAlias as _TypeAlias, TypeGuard
+from typing import TypeGuard
+from typing_extensions import Self, TypeAlias
 
 import mypy.nodes
 from mypy.bogus_type import Bogus