Try dropping Torch from typeshed_internal (#69926)

Summary:
Removes the internal typeshed for PyTorch and replaces it with PyTorch's own type annotations.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/69926

Generated files are in P471601595, P471601643, P471601662

Based on an example in D26410012

Test Plan: Sandcastle

Reviewed By: malfet, pradeep90

Differential Revision: D32292834

fbshipit-source-id: 5223f514cbdccd02c08ef0a027a48d92cdebed2c

tools/codegen/utils.py

@@ -1,11 +1,11 @@
-import re
+import contextlib
+import functools
+import hashlib
 import os
+import re
+import textwrap
 from typing import Tuple, List, Iterable, Iterator, Callable, Sequence, TypeVar, Optional, Dict, Any, Union, Set, NoReturn
 from enum import Enum
-import contextlib
-import textwrap
-import hashlib
-import functools
 
 from tools.codegen.code_template import CodeTemplate
 
@@ -139,6 +139,8 @@ class FileManager:
         except IOError:
             old_contents = None
         if contents != old_contents:
+            # Create output directory if it doesn't exist
+            os.makedirs(os.path.dirname(filename), exist_ok=True)
             with open(filename, 'w') as f:
                 f.write(contents)
 

tools/pyi/gen_pyi.py

@@ -1,8 +1,7 @@
+import argparse
 import collections
 from pprint import pformat
 
-import argparse
-
 from tools.codegen.model import Variant
 from tools.codegen.api.python import (PythonSignatureGroup,
                                       PythonSignatureNativeFunctionPair)
@@ -10,7 +9,7 @@ from tools.codegen.gen import parse_native_yaml
 from tools.codegen.utils import FileManager
 from typing import Sequence, List, Dict
 
-from ..autograd.gen_python_functions import should_generate_py_binding, load_signatures, group_overloads
+from tools.autograd.gen_python_functions import should_generate_py_binding, load_signatures, group_overloads
 
 """
 This module implements generation of type stubs for PyTorch,