use Index[Any] for __eq__ and __neq__

Author: MarcoGorelli

pandas-stubs/_libs/tslibs/timestamps.pyi

@@ -9,6 +9,7 @@ from datetime import (
 import sys
 from time import struct_time
 from typing import (
+    Any,
     ClassVar,
     Literal,
     SupportsIndex,
@@ -19,6 +20,7 @@ from _typing import TimeZones
 import numpy as np
 from pandas import (
     DatetimeIndex,
+    Index,
     TimedeltaIndex,
 )
 from pandas.core.series import (
@@ -231,15 +233,15 @@ class Timestamp(datetime, SupportsIndex):
     @overload
     def __eq__(self, other: TimestampSeries) -> Series[bool]: ...  # type: ignore[overload-overlap]
     @overload
-    def __eq__(self, other: npt.NDArray[np.datetime64] | DatetimeIndex) -> np_ndarray_bool: ...  # type: ignore[overload-overlap]
+    def __eq__(self, other: npt.NDArray[np.datetime64] | Index[Any]) -> np_ndarray_bool: ...  # type: ignore[overload-overlap]
     @overload
     def __eq__(self, other: object) -> Literal[False]: ...
     @overload
     def __ne__(self, other: Timestamp | datetime | np.datetime64) -> bool: ...  # type: ignore[overload-overlap] # pyright: ignore[reportOverlappingOverload]
     @overload
     def __ne__(self, other: TimestampSeries) -> Series[bool]: ...  # type: ignore[overload-overlap]
     @overload
-    def __ne__(self, other: npt.NDArray[np.datetime64] | DatetimeIndex) -> np_ndarray_bool: ...  # type: ignore[overload-overlap]
+    def __ne__(self, other: npt.NDArray[np.datetime64] | Index[Any]) -> np_ndarray_bool: ...  # type: ignore[overload-overlap]
     @overload
     def __ne__(self, other: object) -> Literal[True]: ...
     def __hash__(self) -> int: ...

tests/test_scalars.py

@@ -1325,6 +1325,8 @@ def test_timestamp_cmp() -> None:
 
     check(assert_type(ts >= c_datetimeindex, np_ndarray_bool), np.ndarray, np.bool_)
     check(assert_type(ts < c_datetimeindex, np_ndarray_bool), np.ndarray, np.bool_)
+    check(assert_type(ts >= c_unknown_index, np_ndarray_bool), np.ndarray, np.bool_)
+    check(assert_type(ts < c_unknown_index, np_ndarray_bool), np.ndarray, np.bool_)
 
     check(assert_type(ts >= c_np_ndarray_dt64, np_ndarray_bool), np.ndarray, np.bool_)
     check(assert_type(ts < c_np_ndarray_dt64, np_ndarray_bool), np.ndarray, np.bool_)
@@ -1370,6 +1372,13 @@ def test_timestamp_cmp() -> None:
         assert_type(ts != c_datetimeindex, np_ndarray_bool), np.ndarray, np.bool_
     )
     assert (eq_arr != ne_arr).all()
+    eq_arr = check(
+        assert_type(ts == c_unknown_index, np_ndarray_bool), np.ndarray, np.bool_
+    )
+    ne_arr = check(
+        assert_type(ts != c_unknown_index, np_ndarray_bool), np.ndarray, np.bool_
+    )
+    assert (eq_arr != ne_arr).all()
 
     eq_arr = check(
         assert_type(ts == c_np_ndarray_dt64, np_ndarray_bool), np.ndarray, np.bool_