Mark stub-only private symbols as @type_check_only in third-party stubs (#14545)

stubs/requests/requests/adapters.pyi

@@ -1,7 +1,7 @@
 from _typeshed import Incomplete
 from collections.abc import Mapping
 from ssl import SSLContext
-from typing import Literal, TypedDict
+from typing import Literal, TypedDict, type_check_only
 from typing_extensions import NotRequired, deprecated
 
 import urllib3
@@ -38,11 +38,13 @@ from .utils import (
 )
 
 # Arguments to urllib3 connection_from_host() functions (except pool_kwargs).
+@type_check_only
 class _HostParams(TypedDict):
     host: str
     scheme: str
     port: int
 
+@type_check_only
 class _PoolKwargs(TypedDict):
     ssl_context: NotRequired[SSLContext]
     ca_certs: NotRequired[str]

stubs/requests/requests/help.pyi

@@ -1,21 +1,27 @@
-from typing import TypedDict
+from typing import TypedDict, type_check_only
 
+@type_check_only
 class _VersionDict(TypedDict):
     version: str
 
+@type_check_only
 class _OptionalVersionDict(TypedDict):
     version: str | None
 
+@type_check_only
 class _PlatformDict(TypedDict):
     system: str
     release: str
 
+@type_check_only
 class _ImplementationDict(_VersionDict):
     name: str
 
+@type_check_only
 class _PyOpenSSLDict(_OptionalVersionDict):
     openssl_version: str
 
+@type_check_only
 class _InfoDict(TypedDict):
     platform: _PlatformDict
     implementation: _ImplementationDict

stubs/requests/requests/sessions.pyi

@@ -1,6 +1,6 @@
 from _typeshed import SupportsItems, SupportsRead, Unused
 from collections.abc import Callable, Iterable, Mapping, MutableMapping
-from typing import Any, TypedDict
+from typing import Any, TypedDict, type_check_only
 from typing_extensions import Self, TypeAlias
 
 from . import adapters, auth as _auth, compat, cookies, exceptions, hooks, models, status_codes, utils
@@ -105,6 +105,7 @@ _HeadersUpdateMapping: TypeAlias = Mapping[str, str | bytes | None]
 _Timeout: TypeAlias = float | tuple[float, float] | tuple[float, None]
 _Verify: TypeAlias = bool | str
 
+@type_check_only
 class _Settings(TypedDict):
     verify: _Verify | None
     proxies: _TextMapping