Add type parameters to generics in isna and notna (#945)

* Add type parameters to generics in isna and notna

* Reintroduce ArrayLike

Author: JanEricNitschke

pandas-stubs/_typing.pyi

@@ -53,7 +53,7 @@ from pandas.io.formats.format import EngFormatter
 # where it is the only acceptable type.
 Incomplete: TypeAlias = Any
 
-ArrayLike: TypeAlias = ExtensionArray | np.ndarray
+ArrayLike: TypeAlias = ExtensionArray | np.ndarray[Any, Any]
 AnyArrayLike: TypeAlias = Index | Series | np.ndarray
 PythonScalar: TypeAlias = str | bool | complex
 DatetimeLikeScalar = TypeVar("DatetimeLikeScalar", Period, Timestamp, Timedelta)

pandas-stubs/core/dtypes/missing.pyi

@@ -1,4 +1,7 @@
-from typing import overload
+from typing import (
+    Any,
+    overload,
+)
 
 import numpy as np
 from numpy import typing as npt
@@ -23,9 +26,9 @@ isneginf_scalar = ...
 @overload
 def isna(obj: DataFrame) -> DataFrame: ...
 @overload
-def isna(obj: Series) -> Series[bool]: ...
+def isna(obj: Series[Any]) -> Series[bool]: ...
 @overload
-def isna(obj: Index | list | ArrayLike) -> npt.NDArray[np.bool_]: ...
+def isna(obj: Index[Any] | list[Any] | ArrayLike) -> npt.NDArray[np.bool_]: ...
 @overload
 def isna(
     obj: Scalar | NaTType | NAType | None,
@@ -36,9 +39,9 @@ isnull = isna
 @overload
 def notna(obj: DataFrame) -> DataFrame: ...
 @overload
-def notna(obj: Series) -> Series[bool]: ...
+def notna(obj: Series[Any]) -> Series[bool]: ...
 @overload
-def notna(obj: Index | list | ArrayLike) -> npt.NDArray[np.bool_]: ...
+def notna(obj: Index[Any] | list[Any] | ArrayLike) -> npt.NDArray[np.bool_]: ...
 @overload
 def notna(obj: ScalarT | NaTType | NAType | None) -> TypeGuard[ScalarT]: ...