BUG: Remove special-casing for Python date objects in DatetimeIndex

Author: Aniketsy

pandas/core/indexes/base.py

@@ -19,6 +19,7 @@
 import warnings
 
 import numpy as np
+import pyarrow as pa
 
 from pandas._config import (
     get_option,
@@ -6303,6 +6304,19 @@ def _is_comparable_dtype(self, dtype: DtypeObj) -> bool:
             return dtype.kind == "b"
         elif is_numeric_dtype(self.dtype):
             return is_numeric_dtype(dtype)
+        # GH#62158
+        elif isinstance(dtype, ArrowDtype):
+            if dtype.kind != "M":
+                return False
+            pa_dtype = dtype.pyarrow_dtype
+            if pa.types.is_date(pa_dtype):
+                return False
+            if pa.types.is_timestamp(pa_dtype):
+                if (getattr(pa_dtype, "tz", None) is None) ^ (
+                    getattr(self, "tz", None) is None
+                ):
+                    return False
+            return True
         # TODO: this was written assuming we only get here with object-dtype,
         #  which is no longer correct. Can we specialize for EA?
         return True

pandas/core/indexes/datetimes.py

@@ -42,7 +42,6 @@
     tz_to_dtype,
 )
 import pandas.core.common as com
-from pandas.core.indexes.api import ensure_index
 from pandas.core.indexes.base import (
     Index,
     maybe_extract_name,
@@ -699,21 +698,6 @@ def check_str_or_none(point) -> bool:
         else:
             return indexer
 
-    def get_indexer(self, target, method=None, limit=None, tolerance=None):
-        # Ensure Python `date` objects never match DatetimeIndex elements (GH#62158)
-        tgt = ensure_index(target)
-        if method is None and tolerance is None and tgt.dtype == object:
-            result = super().get_indexer(
-                tgt, method=method, limit=limit, tolerance=tolerance
-            )
-            mask = [
-                isinstance(x, dt.date) and not isinstance(x, dt.datetime) for x in tgt
-            ]
-            result = np.array(result)
-            result[mask] = -1
-            return result
-        return super().get_indexer(tgt, method=method, limit=limit, tolerance=tolerance)
-
     # --------------------------------------------------------------------
 
     @property