Add some missing types to BaseOffset and ExtensionArray (#1330)

improve typing of BaseOffset and ExtensionArray

Author: MarcoGorelli

pandas-stubs/_libs/tslibs/offsets.pyi

@@ -29,11 +29,11 @@ class ApplyTypeError(TypeError): ...
 class BaseOffset:
     n: int
     def __init__(self, n: int = ..., normalize: bool = ...) -> None: ...
-    def __eq__(self, other) -> bool: ...
-    def __ne__(self, other) -> bool: ...
+    def __eq__(self, other: object) -> bool: ...
+    def __ne__(self, other: object) -> bool: ...
     def __hash__(self) -> int: ...
     @property
-    def kwds(self) -> dict: ...
+    def kwds(self) -> dict[str, Any]: ...
     @property
     def base(self) -> BaseOffset: ...
     @overload
@@ -67,7 +67,6 @@ class BaseOffset:
     def __rsub__(self, other: BaseOffset) -> Self: ...
     @overload
     def __rsub__(self, other: _TimedeltaT) -> _TimedeltaT: ...
-    def __call__(self, other): ...
     @overload
     def __mul__(self, other: np.ndarray) -> np.ndarray: ...
     @overload
@@ -87,8 +86,6 @@ class BaseOffset:
     def rollback(self, dt: datetime) -> datetime: ...
     def rollforward(self, dt: datetime) -> datetime: ...
     def is_on_offset(self, dt: datetime) -> bool: ...
-    def __setstate__(self, state) -> None: ...
-    def __getstate__(self): ...
     @property
     def nanos(self) -> int: ...
 

pandas-stubs/core/arrays/base.pyi

@@ -1,3 +1,4 @@
+from collections.abc import Iterator
 from typing import (
     Any,
     overload,
@@ -23,16 +24,16 @@ class ExtensionArray:
     def __getitem__(self, item: ScalarIndexer) -> Any: ...
     @overload
     def __getitem__(self, item: SequenceIndexer) -> Self: ...
-    def __setitem__(self, key: int | slice | np.ndarray, value) -> None: ...
+    def __setitem__(self, key: int | slice | np.ndarray, value: Any) -> None: ...
     def __len__(self) -> int: ...
-    def __iter__(self): ...
+    def __iter__(self) -> Iterator[Any]: ...
     def __contains__(self, item: object) -> bool | np.bool_: ...
     def to_numpy(
         self,
         dtype: npt.DTypeLike | None = ...,
         copy: bool = False,
         na_value: Scalar = ...,
-    ) -> np_1darray: ...
+    ) -> np_1darray[Any]: ...
     @property
     def dtype(self) -> ExtensionDtype: ...
     @property