DEPR: remove deprecated date casting; closes pandas-dev#21359

Author: jbrockmendel

pandas/core/ops.py

@@ -5,9 +5,7 @@
 """
 import datetime
 import operator
-import textwrap
 from typing import Dict, Optional
-import warnings
 
 import numpy as np
 
@@ -1817,32 +1815,6 @@ def wrapper(self, other, axis=None):
         elif is_datetime64_dtype(self) or is_datetime64tz_dtype(self):
             # Dispatch to DatetimeIndex to ensure identical
             # Series/Index behavior
-            if (isinstance(other, datetime.date) and
-                    not isinstance(other, datetime.datetime)):
-                # https://github.com/pandas-dev/pandas/issues/21152
-                # Compatibility for difference between Series comparison w/
-                # datetime and date
-                msg = (
-                    "Comparing Series of datetimes with 'datetime.date'.  "
-                    "Currently, the 'datetime.date' is coerced to a "
-                    "datetime. In the future pandas will not coerce, "
-                    "and {future}. "
-                    "To retain the current behavior, "
-                    "convert the 'datetime.date' to a datetime with "
-                    "'pd.Timestamp'."
-                )
-
-                if op in {operator.lt, operator.le, operator.gt, operator.ge}:
-                    future = "a TypeError will be raised"
-                else:
-                    future = (
-                        "'the values will not compare equal to the "
-                        "'datetime.date'"
-                    )
-                msg = '\n'.join(textwrap.wrap(msg.format(future=future)))
-                warnings.warn(msg, FutureWarning, stacklevel=2)
-                other = pd.Timestamp(other)
-
             res_values = dispatch_to_index_op(op, self, other,
                                               pd.DatetimeIndex)
 

pandas/tests/arithmetic/test_datetime64.py

@@ -207,57 +207,17 @@ def test_series_comparison_scalars(self):
         expected = Series([x > val for x in series])
         tm.assert_series_equal(result, expected)
 
-    def test_dt64_ser_cmp_date_warning(self):
-        # https://github.com/pandas-dev/pandas/issues/21359
-        # Remove this test and enble invalid test below
-        ser = pd.Series(pd.date_range('20010101', periods=10), name='dates')
-        date = ser.iloc[0].to_pydatetime().date()
-
-        with tm.assert_produces_warning(FutureWarning) as m:
-            result = ser == date
-        expected = pd.Series([True] + [False] * 9, name='dates')
-        tm.assert_series_equal(result, expected)
-        assert "Comparing Series of datetimes " in str(m[0].message)
-        assert "will not compare equal" in str(m[0].message)
-
-        with tm.assert_produces_warning(FutureWarning) as m:
-            result = ser != date
-        tm.assert_series_equal(result, ~expected)
-        assert "will not compare equal" in str(m[0].message)
-
-        with tm.assert_produces_warning(FutureWarning) as m:
-            result = ser <= date
-        tm.assert_series_equal(result, expected)
-        assert "a TypeError will be raised" in str(m[0].message)
-
-        with tm.assert_produces_warning(FutureWarning) as m:
-            result = ser < date
-        tm.assert_series_equal(result, pd.Series([False] * 10, name='dates'))
-        assert "a TypeError will be raised" in str(m[0].message)
-
-        with tm.assert_produces_warning(FutureWarning) as m:
-            result = ser >= date
-        tm.assert_series_equal(result, pd.Series([True] * 10, name='dates'))
-        assert "a TypeError will be raised" in str(m[0].message)
-
-        with tm.assert_produces_warning(FutureWarning) as m:
-            result = ser > date
-        tm.assert_series_equal(result, pd.Series([False] + [True] * 9,
-                                                 name='dates'))
-        assert "a TypeError will be raised" in str(m[0].message)
-
-    @pytest.mark.skip(reason="GH#21359")
     def test_dt64ser_cmp_date_invalid(self, box_with_array):
         # GH#19800 datetime.date comparison raises to
         # match DatetimeIndex/Timestamp.  This also matches the behavior
         # of stdlib datetime.datetime
 
         ser = pd.date_range('20010101', periods=10)
-        date = ser.iloc[0].to_pydatetime().date()
+        date = ser[0].to_pydatetime().date()
 
         ser = tm.box_expected(ser, box_with_array)
-        assert not (ser == date).any()
-        assert (ser != date).all()
+        assert_all(~(ser == date))
+        assert_all(ser != date)
         with pytest.raises(TypeError):
             ser > date
         with pytest.raises(TypeError):