stdlib: Use pos-only parameters for many Protocols

Some of the fallout from PyCQA/flake8-pyi#442.

In each case, I looked at CPython to check how the protocol is being used.

stdlib/_typeshed/wsgi.pyi

@@ -11,7 +11,7 @@ from typing import Any, Protocol
 from typing_extensions import TypeAlias
 
 class _Readable(Protocol):
-    def read(self, size: int = ...) -> bytes: ...
+    def read(self, __size: int = ...) -> bytes: ...
     # Optional: def close(self) -> object: ...
 
 if sys.version_info >= (3, 11):

stdlib/_typeshed/xml.pyi

@@ -4,6 +4,6 @@ from typing import Any, Protocol
 
 # As defined https://docs.python.org/3/library/xml.dom.html#domimplementation-objects
 class DOMImplementation(Protocol):
-    def hasFeature(self, feature: str, version: str | None) -> bool: ...
-    def createDocument(self, namespaceUri: str, qualifiedName: str, doctype: Any | None) -> Any: ...
-    def createDocumentType(self, qualifiedName: str, publicId: str, systemId: str) -> Any: ...
+    def hasFeature(self, __feature: str, __version: str | None) -> bool: ...
+    def createDocument(self, __namespaceUri: str, __qualifiedName: str, __doctype: Any | None) -> Any: ...
+    def createDocumentType(self, __qualifiedName: str, __publicId: str, __systemId: str) -> Any: ...

stdlib/argparse.pyi

@@ -120,7 +120,7 @@ class _ActionsContainer:
     def _handle_conflict_resolve(self, action: Action, conflicting_actions: Iterable[tuple[str, Action]]) -> None: ...
 
 class _FormatterClass(Protocol):
-    def __call__(self, prog: str) -> HelpFormatter: ...
+    def __call__(self, *, prog: str) -> HelpFormatter: ...
 
 class ArgumentParser(_AttributeHolder, _ActionsContainer):
     prog: str

stdlib/codecs.pyi

@@ -90,10 +90,10 @@ class _StreamWriter(Protocol):
     def __call__(self, __stream: _WritableStream, __errors: str = ...) -> StreamWriter: ...
 
 class _IncrementalEncoder(Protocol):
-    def __call__(self, errors: str = ...) -> IncrementalEncoder: ...
+    def __call__(self, __errors: str = ...) -> IncrementalEncoder: ...
 
 class _IncrementalDecoder(Protocol):
-    def __call__(self, errors: str = ...) -> IncrementalDecoder: ...
+    def __call__(self, __errors: str = ...) -> IncrementalDecoder: ...
 
 class CodecInfo(tuple[_Encoder, _Decoder, _StreamReader, _StreamWriter]):
     _is_text_encoding: bool

stdlib/compileall.pyi

@@ -6,7 +6,7 @@ from typing import Any, Protocol
 __all__ = ["compile_dir", "compile_file", "compile_path"]
 
 class _SupportsSearch(Protocol):
-    def search(self, string: str) -> Any: ...
+    def search(self, __string: str) -> Any: ...
 
 if sys.version_info >= (3, 10):
     def compile_dir(

stdlib/email/headerregistry.pyi

@@ -143,9 +143,9 @@ if sys.version_info >= (3, 8):
 class _HeaderParser(Protocol):
     max_count: ClassVar[Literal[1] | None]
     @staticmethod
-    def value_parser(value: str) -> TokenList: ...
+    def value_parser(__value: str) -> TokenList: ...
     @classmethod
-    def parse(cls, value: str, kwds: dict[str, Any]) -> None: ...
+    def parse(cls, __value: str, __kwds: dict[str, Any]) -> None: ...
 
 class HeaderRegistry:
     registry: dict[str, type[_HeaderParser]]

stdlib/imghdr.pyi

@@ -6,8 +6,8 @@ __all__ = ["what"]
 
 class _ReadableBinary(Protocol):
     def tell(self) -> int: ...
-    def read(self, size: int) -> bytes: ...
-    def seek(self, offset: int) -> Any: ...
+    def read(self, __size: int) -> bytes: ...
+    def seek(self, __offset: int) -> Any: ...
 
 @overload
 def what(file: StrPath | _ReadableBinary, h: None = None) -> str | None: ...

stdlib/imp.pyi

@@ -45,7 +45,7 @@ class _FileLike(Protocol):
     def read(self) -> str | bytes: ...
     def close(self) -> Any: ...
     def __enter__(self) -> Any: ...
-    def __exit__(self, typ: type[BaseException] | None, exc: BaseException | None, tb: TracebackType | None) -> Any: ...
+    def __exit__(self, __typ: type[BaseException] | None, __exc: BaseException | None, __tb: TracebackType | None) -> Any: ...
 
 # PathLike doesn't work for the pathname argument here
 def load_source(name: str, pathname: str, file: _FileLike | None = None) -> types.ModuleType: ...

stdlib/importlib/abc.pyi

@@ -138,10 +138,10 @@ if sys.version_info >= (3, 9):
         # which is not the case.
         @overload
         @abstractmethod
-        def open(self, mode: Literal["r", "w"] = "r", *, encoding: str | None = None, errors: str | None = None) -> IO[str]: ...
+        def open(self, __mode: Literal["r", "w"] = "r", *, encoding: str | None = None, errors: str | None = None) -> IO[str]: ...
         @overload
         @abstractmethod
-        def open(self, mode: Literal["rb", "wb"]) -> IO[bytes]: ...
+        def open(self, __mode: Literal["rb", "wb"]) -> IO[bytes]: ...
         @property
         @abstractmethod
         def name(self) -> str: ...

stdlib/types.pyi

@@ -335,7 +335,7 @@ class SimpleNamespace:
     def __delattr__(self, __name: str) -> None: ...
 
 class _LoaderProtocol(Protocol):
-    def load_module(self, fullname: str) -> ModuleType: ...
+    def load_module(self, __fullname: str) -> ModuleType: ...
 
 class ModuleType:
     __name__: str