[1/N] Apply py39 ruff fixes (#138578)

Pull Request resolved: https://github.com/pytorch/pytorch/pull/138578
Approved by: https://github.com/Skylion007

mypy-strict.ini

@@ -6,7 +6,7 @@
 # files.
 
 [mypy]
-python_version = 3.8
+python_version = 3.9
 plugins = mypy_plugins/check_mypy_version.py, numpy.typing.mypy_plugin
 
 cache_dir = .mypy_cache/strict

torchgen/api/autograd.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import re
 from dataclasses import dataclass
-from typing import cast, Sequence
+from typing import cast, TYPE_CHECKING
 
 from torchgen import local
 from torchgen.api import cpp
@@ -20,6 +20,10 @@ from torchgen.model import (
 from torchgen.utils import IDENT_REGEX
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 # Represents a saved attribute involved in backward calculation.
 # Note that it can be a derived property of an input argument, e.g.:
 # we could save `other.scalar_type()` instead of the entire `other` tensor.

torchgen/api/cpp.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 from torchgen import local
 from torchgen.api.types import (
@@ -51,6 +51,10 @@ from torchgen.model import (
 from torchgen.utils import assert_never
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 # This file describes the translation of JIT schema to the public C++
 # API, which is what people use when they call functions like at::add.
 #

torchgen/api/dispatcher.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import itertools
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 from torchgen.api import cpp
 from torchgen.api.types import ArgName, Binding, CType, NamedCType
@@ -16,6 +16,10 @@ from torchgen.model import (
 from torchgen.utils import assert_never, concatMap
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 # This file describes the translation of JIT schema to the dispatcher
 # API, the *unboxed* calling convention by which invocations through
 # the dispatcher are made.  Historically, the dispatcher API matched

torchgen/api/native.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 from torchgen import local
 from torchgen.api import cpp
@@ -32,6 +32,10 @@ from torchgen.model import (
 from torchgen.utils import assert_never
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 # This file describes the translation of JIT schema to the native functions API.
 # This looks a lot like the C++ API (which makes historical sense, because the
 # idea was you wrote native functions to implement functions in the C++ API),

torchgen/api/python.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from dataclasses import dataclass
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 from torchgen.api import cpp
 from torchgen.api.types import Binding, CppSignature, CppSignatureGroup
@@ -20,6 +20,10 @@ from torchgen.model import (
 )
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
 #
 #                           Data Models

torchgen/api/translate.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import NoReturn, Sequence
+from typing import NoReturn, TYPE_CHECKING
 
 from torchgen.api.types import (
     ArrayRefCType,
@@ -36,6 +36,10 @@ from torchgen.api.types import (
 )
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 # This file implements a small program synthesis engine that implements
 # conversions between one API to another.
 #

torchgen/api/types/signatures.py

@@ -1,12 +1,14 @@
 from __future__ import annotations
 
 from dataclasses import dataclass
-from typing import Iterator, Sequence, TYPE_CHECKING
+from typing import TYPE_CHECKING
 
 from torchgen.api.types.types_base import Binding, CType, Expr
 
 
 if TYPE_CHECKING:
+    from collections.abc import Iterator, Sequence
+
     from torchgen.model import (
         BackendIndex,
         FunctionSchema,

torchgen/code_template.py

@@ -1,7 +1,11 @@
 from __future__ import annotations
 
 import re
-from typing import Mapping, Sequence
+from typing import TYPE_CHECKING
+
+
+if TYPE_CHECKING:
+    from collections.abc import Mapping, Sequence
 
 
 # match $identifier or ${identifier} and replace with value in env

torchgen/context.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import contextlib
 import functools
-from typing import Any, Callable, Iterator, List, Optional, Tuple, TypeVar, Union
+from typing import Any, Callable, List, Optional, Tuple, TYPE_CHECKING, TypeVar, Union
 
 import torchgen.local as local
 from torchgen.model import (
@@ -15,6 +15,10 @@ from torchgen.model import (
 from torchgen.utils import context, S, T
 
 
+if TYPE_CHECKING:
+    from collections.abc import Iterator
+
+
 # Helper functions for defining generators on things in the model
 
 F = TypeVar(

torchgen/dest/ufunc.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from dataclasses import dataclass
-from typing import Sequence, TYPE_CHECKING
+from typing import TYPE_CHECKING
 
 import torchgen.api.ufunc as ufunc
 from torchgen.api.translate import translate
@@ -30,6 +30,8 @@ from torchgen.utils import OrderedSet
 
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     from torchgen.api.ufunc import UfunctorBindings
 
 

torchgen/executorch/api/custom_ops.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from collections import defaultdict
 from dataclasses import dataclass
-from typing import Sequence, TYPE_CHECKING
+from typing import TYPE_CHECKING
 
 from torchgen import dest
 
@@ -15,6 +15,8 @@ from torchgen.utils import concatMap, Target
 
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     from torchgen.executorch.model import ETKernelIndex
     from torchgen.selective_build.selector import SelectiveBuilder
 

torchgen/executorch/api/et_cpp.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 from torchgen import local
 from torchgen.api.types import (
@@ -40,6 +40,10 @@ from torchgen.model import (
 from torchgen.utils import assert_never
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 """
 This file describes the translation of JIT schema to the public C++ API, which is what people use when they call
 functions like at::add. It also serves as a native function API, which is the signature of kernels,

torchgen/executorch/api/unboxing.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from dataclasses import dataclass
-from typing import Callable, Sequence, TYPE_CHECKING
+from typing import Callable, TYPE_CHECKING
 
 from torchgen.model import (
     Argument,
@@ -15,6 +15,8 @@ from torchgen.model import (
 
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     from torchgen.api.types import Binding, CType, NamedCType
 
 

torchgen/gen.py

@@ -8,7 +8,7 @@ import os
 from collections import defaultdict, namedtuple, OrderedDict
 from dataclasses import dataclass, field
 from pathlib import Path
-from typing import Any, Callable, Literal, Sequence, TypeVar
+from typing import Any, Callable, Literal, TYPE_CHECKING, TypeVar
 
 import yaml
 
@@ -96,6 +96,10 @@ from torchgen.utils import (
 from torchgen.yaml_utils import YamlDumper, YamlLoader
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 T = TypeVar("T")
 
 # Welcome to the ATen code generator v2!  The ATen code generator is
@@ -229,7 +233,7 @@ def parse_tags_yaml_struct(es: object, path: str = "<stdin>") -> set[str]:
     return rs
 
 
-@functools.lru_cache(maxsize=None)
+@functools.cache
 def parse_tags_yaml(path: str) -> set[str]:
     global _GLOBAL_PARSE_TAGS_YAML_CACHE
     if path not in _GLOBAL_PARSE_TAGS_YAML_CACHE:

torchgen/gen_aoti_c_shim.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import textwrap
 from dataclasses import dataclass
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 from torchgen.api.types import DispatcherSignature
 from torchgen.api.types.signatures import CppSignature, CppSignatureGroup
@@ -24,6 +24,10 @@ from torchgen.model import (
 from torchgen.utils import mapMaybe
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 base_type_to_c_type = {
     BaseTy.Tensor: "AtenTensorHandle",
     BaseTy.bool: "int32_t",  # Use int to pass bool

torchgen/gen_backend_stubs.py

@@ -5,7 +5,7 @@ import os
 import re
 from collections import Counter, defaultdict, namedtuple
 from pathlib import Path
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 import yaml
 
@@ -28,6 +28,10 @@ from torchgen.utils import concatMap, context, FileManager, NamespaceHelper, Tar
 from torchgen.yaml_utils import YamlLoader
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 # Parses the external backend's yaml, and adds a new BackendIndex for the backend's dispatch key.
 # Returns a Tuple of (backend_key, autograd_key, cpp_namespace, updated BackendIndex mapping)
 ParsedExternalYaml = namedtuple(

torchgen/gen_executorch.py

@@ -5,7 +5,7 @@ import os
 from collections import defaultdict
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Any, Callable, Sequence, TextIO, TYPE_CHECKING
+from typing import Any, Callable, TextIO, TYPE_CHECKING
 
 import yaml
 
@@ -57,6 +57,8 @@ from torchgen.utils import (
 
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     from torchgen.selective_build.selector import SelectiveBuilder
 
 

torchgen/gen_lazy_tensor.py

@@ -4,7 +4,7 @@ import argparse
 import os
 from collections import namedtuple
 from pathlib import Path
-from typing import Any, Callable, Iterable, Iterator, Sequence
+from typing import Any, Callable, TYPE_CHECKING
 
 import yaml
 
@@ -25,6 +25,10 @@ from torchgen.utils import FileManager, NamespaceHelper
 from torchgen.yaml_utils import YamlLoader
 
 
+if TYPE_CHECKING:
+    from collections.abc import Iterable, Iterator, Sequence
+
+
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
 #
 #                        Lazy Tensor Codegen

torchgen/gen_vmap_plumbing.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import textwrap
 from dataclasses import dataclass
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 from torchgen.api.translate import translate
 from torchgen.api.types import DispatcherSignature
@@ -22,6 +22,10 @@ from torchgen.model import (
 from torchgen.utils import mapMaybe
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 def is_tensor(typ: Type) -> bool:
     return isinstance(typ, BaseType) and typ.name == BaseTy.Tensor
 

torchgen/local.py

@@ -2,7 +2,11 @@ from __future__ import annotations
 
 import threading
 from contextlib import contextmanager
-from typing import Iterator
+from typing import TYPE_CHECKING
+
+
+if TYPE_CHECKING:
+    from collections.abc import Iterator
 
 
 # Simple dynamic scoping implementation.  The name "parametrize" comes

torchgen/model.py

@@ -5,11 +5,15 @@ import itertools
 import re
 from dataclasses import dataclass
 from enum import auto, Enum
-from typing import Callable, Iterator, List, Sequence
+from typing import Callable, List, TYPE_CHECKING
 
 from torchgen.utils import assert_never, NamespaceHelper, OrderedSet
 
 
+if TYPE_CHECKING:
+    from collections.abc import Iterator, Sequence
+
+
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
 #
 #                           DATA MODEL

torchgen/native_function_generation.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import string
 from collections import defaultdict
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 import torchgen.api.dispatcher as dispatcher
 from torchgen.api.translate import translate
@@ -30,6 +30,10 @@ from torchgen.model import (
 from torchgen.utils import concatMap
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 # See Note: [Out ops with functional variants that don't get grouped properly]
 OUT_OPS_THAT_DONT_GET_GROUPED_PROPERLY = [
     # This has a functional variant, but it's currently marked private.

torchgen/static_runtime/gen_static_runtime_ops.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import argparse
 import itertools
 import os
-from typing import Sequence, TypeVar, Union
+from typing import TYPE_CHECKING, TypeVar, Union
 
 from libfb.py.log import set_simple_logging  # type: ignore[import]
 
@@ -13,6 +13,10 @@ from torchgen.model import DispatchKey, NativeFunctionsGroup, NativeFunctionsVie
 from torchgen.static_runtime import config, generator
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 # Given a list of `grouped_native_functions` sorted by their op names, return a list of
 # lists each of which groups ops that share the base name. For example, `mean` and
 # `mean.dim` are grouped together by this function.

torchgen/static_runtime/generator.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import json
 import logging
 import math
-from typing import Sequence
+from typing import TYPE_CHECKING
 
 import torchgen.api.cpp as cpp
 from torchgen.context import native_function_manager
@@ -23,6 +23,10 @@ from torchgen.model import (
 from torchgen.static_runtime import config
 
 
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
+
 logger: logging.Logger = logging.getLogger()
 
 

torchgen/utils.py

@@ -10,18 +10,7 @@ import textwrap
 from dataclasses import fields, is_dataclass
 from enum import auto, Enum
 from pathlib import Path
-from typing import (
-    Any,
-    Callable,
-    Generic,
-    Iterable,
-    Iterator,
-    Literal,
-    NoReturn,
-    Sequence,
-    TYPE_CHECKING,
-    TypeVar,
-)
+from typing import Any, Callable, Generic, Literal, NoReturn, TYPE_CHECKING, TypeVar
 from typing_extensions import Self
 
 from torchgen.code_template import CodeTemplate
@@ -29,6 +18,7 @@ from torchgen.code_template import CodeTemplate
 
 if TYPE_CHECKING:
     from argparse import Namespace
+    from collections.abc import Iterable, Iterator, Sequence
 
 
 REPO_ROOT = Path(__file__).absolute().parent.parent
@@ -113,7 +103,7 @@ def assert_never(x: NoReturn) -> NoReturn:
     raise AssertionError(f"Unhandled type: {type(x).__name__}")
 
 
-@functools.lru_cache(maxsize=None)
+@functools.cache
 def _read_template(template_fn: str) -> CodeTemplate:
     return CodeTemplate.from_file(template_fn)