FIX: date comparison fails when series is all pd.NaT values #61188

Author: Mohit-Kundu

pandas/core/indexes/accessors.py

@@ -11,11 +11,8 @@
 )
 import warnings
 
-
 import numpy as np
 
-
-
 from pandas._libs import lib
 from pandas.util._exceptions import find_stack_level
 
@@ -111,7 +108,12 @@ def _delegate_property_get(self, name: str):
         else:
             index = self._parent.index
         # return the result as a Series
-        return Series(result, index=index, name=self.name, dtype=result.dtype).__finalize__(self._parent)
+        return Series(
+            result,
+            index=index,
+            name=self.name,
+            dtype=result.dtype
+        ).__finalize__(self._parent)
 
     def _delegate_property_set(self, name: str, value, *args, **kwargs) -> NoReturn:
         raise ValueError(

pandas/tests/series/indexing/test_datetime.py

@@ -495,19 +495,19 @@ def test_compare_datetime_with_all_none():
 def test_dt_date_dtype_all_nat_is_object():
     # Ensure .dt.date on all-NaT Series returns object dtype and not datetime64
     # GH#61188
-    s = pd.Series([pd.NaT, pd.NaT])
+    s = Series([pd.NaT, pd.NaT])
     s = pd.to_datetime(s)
     result = s.dt.date
 
-    expected = pd.Series([pd.NaT, pd.NaT], dtype=object)
+    expected = Series([pd.NaT, pd.NaT], dtype=object)
 
     tm.assert_series_equal(result, expected)
 
 def test_dt_date_all_nat_le_date():
     #All-NaT Series should not raise error when compared to a datetime.date
     # GH#61188
-    s = pd.Series([pd.NaT, pd.NaT])
+    s = Series([pd.NaT, pd.NaT])
     s = pd.to_datetime(s)
     result = s.dt.date <= datetime.now().date()
-    expected = pd.Series([False, False])
+    expected = Series([False, False])
     tm.assert_series_equal(result, expected)