Run pyupgrade --py38-plus on the source code (#15575)

Author: sobolevn

misc/analyze_cache.py

@@ -6,8 +6,8 @@
 import os
 import os.path
 from collections import Counter
-from typing import Any, Dict, Iterable
-from typing_extensions import Final, TypeAlias as _TypeAlias
+from typing import Any, Dict, Final, Iterable
+from typing_extensions import TypeAlias as _TypeAlias
 
 ROOT: Final = ".mypy_cache/3.5"
 

misc/incremental_checker.py

@@ -44,8 +44,8 @@
 import textwrap
 import time
 from argparse import ArgumentParser, Namespace, RawDescriptionHelpFormatter
-from typing import Any, Dict
-from typing_extensions import Final, TypeAlias as _TypeAlias
+from typing import Any, Dict, Final
+from typing_extensions import TypeAlias as _TypeAlias
 
 CACHE_PATH: Final = ".incremental_checker_cache.json"
 MYPY_REPO_URL: Final = "https://github.com/python/mypy.git"

mypy/build.py

@@ -31,14 +31,15 @@
     Callable,
     ClassVar,
     Dict,
+    Final,
     Iterator,
     Mapping,
     NamedTuple,
     NoReturn,
     Sequence,
     TextIO,
 )
-from typing_extensions import Final, TypeAlias as _TypeAlias, TypedDict
+from typing_extensions import TypeAlias as _TypeAlias, TypedDict
 
 import mypy.semanal_main
 from mypy.checker import TypeChecker

mypy/checker.py

@@ -9,6 +9,7 @@
     AbstractSet,
     Callable,
     Dict,
+    Final,
     Generic,
     Iterable,
     Iterator,
@@ -22,7 +23,7 @@
     cast,
     overload,
 )
-from typing_extensions import Final, TypeAlias as _TypeAlias
+from typing_extensions import TypeAlias as _TypeAlias
 
 import mypy.checkexpr
 from mypy import errorcodes as codes, message_registry, nodes, operators
@@ -1546,7 +1547,7 @@ def check_reverse_op_method(
                 if opt_meta is not None:
                     forward_inst = opt_meta
 
-        def has_readable_member(typ: Union[UnionType, Instance], name: str) -> bool:
+        def has_readable_member(typ: UnionType | Instance, name: str) -> bool:
             # TODO: Deal with attributes of TupleType etc.
             if isinstance(typ, Instance):
                 return typ.type.has_readable_member(name)

mypy/checkexpr.py

@@ -6,8 +6,8 @@
 import time
 from collections import defaultdict
 from contextlib import contextmanager
-from typing import Callable, ClassVar, Iterable, Iterator, List, Optional, Sequence, cast
-from typing_extensions import Final, TypeAlias as _TypeAlias, overload
+from typing import Callable, ClassVar, Final, Iterable, Iterator, List, Optional, Sequence, cast
+from typing_extensions import TypeAlias as _TypeAlias, overload
 
 import mypy.checker
 import mypy.errorcodes as codes
@@ -5581,7 +5581,7 @@ def replace_callable_return_type(c: CallableType, new_ret_type: Type) -> Callabl
     return c.copy_modified(ret_type=new_ret_type)
 
 
-def apply_poly(tp: CallableType, poly_tvars: Sequence[TypeVarLikeType]) -> Optional[CallableType]:
+def apply_poly(tp: CallableType, poly_tvars: Sequence[TypeVarLikeType]) -> CallableType | None:
     """Make free type variables generic in the type if possible.
 
     This will translate the type `tp` while trying to create valid bindings for

mypy/checkpattern.py

@@ -3,8 +3,7 @@
 from __future__ import annotations
 
 from collections import defaultdict
-from typing import NamedTuple
-from typing_extensions import Final
+from typing import Final, NamedTuple
 
 import mypy.checker
 from mypy import message_registry

mypy/checkstrformat.py

@@ -13,8 +13,8 @@
 from __future__ import annotations
 
 import re
-from typing import TYPE_CHECKING, Callable, Dict, Match, Pattern, Tuple, Union, cast
-from typing_extensions import Final, TypeAlias as _TypeAlias
+from typing import TYPE_CHECKING, Callable, Dict, Final, Match, Pattern, Tuple, Union, cast
+from typing_extensions import TypeAlias as _TypeAlias
 
 import mypy.errorcodes as codes
 from mypy.errors import Errors

mypy/config_parser.py

@@ -19,6 +19,7 @@
     Any,
     Callable,
     Dict,
+    Final,
     Iterable,
     List,
     Mapping,
@@ -28,7 +29,7 @@
     Tuple,
     Union,
 )
-from typing_extensions import Final, TypeAlias as _TypeAlias
+from typing_extensions import TypeAlias as _TypeAlias
 
 from mypy import defaults
 from mypy.options import PER_MODULE_OPTIONS, Options

mypy/constant_fold.py

@@ -5,8 +5,7 @@
 
 from __future__ import annotations
 
-from typing import Union
-from typing_extensions import Final
+from typing import Final, Union
 
 from mypy.nodes import (
     ComplexExpr,

mypy/constraints.py

@@ -2,8 +2,7 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Iterable, List, Sequence, cast
-from typing_extensions import Final
+from typing import TYPE_CHECKING, Final, Iterable, List, Sequence, cast
 
 import mypy.subtypes
 import mypy.typeops