Fix importlib stubtest exceptions (#5148)

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>

stdlib/importlib/abc.pyi

@@ -58,7 +58,8 @@ class FileLoader(ResourceLoader, ExecutionLoader, metaclass=ABCMeta):
     path: _Path
     def __init__(self, fullname: str, path: _Path) -> None: ...
     def get_data(self, path: _Path) -> bytes: ...
-    def get_filename(self, fullname: str) -> _Path: ...
+    def get_filename(self, name: Optional[str] = ...) -> _Path: ...
+    def load_module(self, name: Optional[str] = ...) -> types.ModuleType: ...
 
 if sys.version_info >= (3, 7):
     _PathLike = Union[bytes, str, os.PathLike[Any]]

stdlib/importlib/machinery.pyi

@@ -9,10 +9,12 @@ from _importlib_modulespec import Loader, ModuleSpec as ModuleSpec  # Exported
 class BuiltinImporter(importlib.abc.MetaPathFinder, importlib.abc.InspectLoader):
     # MetaPathFinder
     @classmethod
-    def find_module(cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]]) -> Optional[importlib.abc.Loader]: ...
+    def find_module(
+        cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]] = ...
+    ) -> Optional[importlib.abc.Loader]: ...
     @classmethod
     def find_spec(
-        cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]], target: Optional[types.ModuleType] = ...
+        cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]] = ..., target: Optional[types.ModuleType] = ...
     ) -> Optional[ModuleSpec]: ...
     # InspectLoader
     @classmethod
@@ -34,10 +36,12 @@ class BuiltinImporter(importlib.abc.MetaPathFinder, importlib.abc.InspectLoader)
 class FrozenImporter(importlib.abc.MetaPathFinder, importlib.abc.InspectLoader):
     # MetaPathFinder
     @classmethod
-    def find_module(cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]]) -> Optional[importlib.abc.Loader]: ...
+    def find_module(
+        cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]] = ...
+    ) -> Optional[importlib.abc.Loader]: ...
     @classmethod
     def find_spec(
-        cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]], target: Optional[types.ModuleType] = ...
+        cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]] = ..., target: Optional[types.ModuleType] = ...
     ) -> Optional[ModuleSpec]: ...
     # InspectLoader
     @classmethod
@@ -50,7 +54,7 @@ class FrozenImporter(importlib.abc.MetaPathFinder, importlib.abc.InspectLoader):
     def get_source(cls, fullname: str) -> None: ...
     # Loader
     @staticmethod
-    def module_repr(module: types.ModuleType) -> str: ...
+    def module_repr(m: types.ModuleType) -> str: ...
     @classmethod
     def create_module(cls, spec: ModuleSpec) -> Optional[types.ModuleType]: ...
     @staticmethod
@@ -58,10 +62,12 @@ class FrozenImporter(importlib.abc.MetaPathFinder, importlib.abc.InspectLoader):
 
 class WindowsRegistryFinder(importlib.abc.MetaPathFinder):
     @classmethod
-    def find_module(cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]]) -> Optional[importlib.abc.Loader]: ...
+    def find_module(
+        cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]] = ...
+    ) -> Optional[importlib.abc.Loader]: ...
     @classmethod
     def find_spec(
-        cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]], target: Optional[types.ModuleType] = ...
+        cls, fullname: str, path: Optional[Sequence[importlib.abc._Path]] = ..., target: Optional[types.ModuleType] = ...
     ) -> Optional[ModuleSpec]: ...
 
 class PathFinder:
@@ -90,9 +96,12 @@ class FileFinder(importlib.abc.PathEntryFinder):
         cls, *loader_details: Tuple[importlib.abc.Loader, List[str]]
     ) -> Callable[[str], importlib.abc.PathEntryFinder]: ...
 
-class SourceFileLoader(importlib.abc.FileLoader, importlib.abc.SourceLoader): ...
+class SourceFileLoader(importlib.abc.FileLoader, importlib.abc.SourceLoader):
+    def set_data(self, path: importlib.abc._Path, data: bytes, *, _mode: int = ...) -> None: ...
+
 class SourcelessFileLoader(importlib.abc.FileLoader, importlib.abc.SourceLoader): ...
 
 class ExtensionFileLoader(importlib.abc.ExecutionLoader):
-    def get_filename(self, fullname: str) -> importlib.abc._Path: ...
+    def __init__(self, name: str, path: importlib.abc._Path) -> None: ...
+    def get_filename(self, name: Optional[str] = ...) -> importlib.abc._Path: ...
     def get_source(self, fullname: str) -> None: ...

stdlib/importlib/metadata.pyi

@@ -9,11 +9,11 @@ from typing import Any, Dict, Iterable, List, NamedTuple, Optional, Tuple, Union
 
 if sys.version_info >= (3, 8):
     class PackageNotFoundError(ModuleNotFoundError): ...
-    class EntryPointBase(NamedTuple):
+    class _EntryPointBase(NamedTuple):
         name: str
         value: str
         group: str
-    class EntryPoint(EntryPointBase):
+    class EntryPoint(_EntryPointBase):
         def load(self) -> Any: ...  # Callable[[], Any] or an importable module
         @property
         def extras(self) -> List[str]: ...
@@ -62,8 +62,6 @@ if sys.version_info >= (3, 8):
             def __init__(self, *, name: Optional[str] = ..., path: List[str] = ..., **kwargs: Any) -> None: ...
             @property
             def path(self) -> List[str]: ...
-            @property
-            def pattern(self) -> str: ...
         @abc.abstractmethod
         def find_distributions(self, context: DistributionFinder.Context = ...) -> Iterable[Distribution]: ...
     class MetadataPathFinder(DistributionFinder):

stdlib/importlib/util.pyi

@@ -20,12 +20,11 @@ def spec_from_loader(
     loader: Optional[importlib.abc.Loader],
     *,
     origin: Optional[str] = ...,
-    loader_state: Optional[Any] = ...,
     is_package: Optional[bool] = ...,
 ) -> importlib.machinery.ModuleSpec: ...
 def spec_from_file_location(
     name: str,
-    location: Union[str, bytes, os.PathLike[str], os.PathLike[bytes]],
+    location: Optional[Union[str, bytes, os.PathLike[str], os.PathLike[bytes]]] = ...,
     *,
     loader: Optional[importlib.abc.Loader] = ...,
     submodule_search_locations: Optional[List[str]] = ...,