REGR: Fix comparison broadcasting over array of Intervals

doc/source/whatsnew/v1.1.2.rst

@@ -16,6 +16,7 @@ Fixed regressions
 ~~~~~~~~~~~~~~~~~
 - Regression in :meth:`DatetimeIndex.intersection` incorrectly raising ``AssertionError`` when intersecting against a list (:issue:`35876`)
 - Performance regression for :meth:`RangeIndex.format` (:issue:`35712`)
+- Regression in :meth:`DataFrame.replace` where a ``TypeError`` would be raised when attempting to replace elements of type :class:`Interval` (:issue:`35931`)
 -
 
 

pandas/_libs/interval.pyx

@@ -299,7 +299,6 @@ cdef class Interval(IntervalMixin):
     True
     """
     _typ = "interval"
-    __array_priority__ = 1000
 
     cdef readonly object left
     """

pandas/tests/frame/methods/test_replace.py

@@ -1581,3 +1581,10 @@ def test_replace_with_compiled_regex(self):
         result = df.replace({regex: "z"}, regex=True)
         expected = pd.DataFrame(["z", "b", "c"])
         tm.assert_frame_equal(result, expected)
+
+    def test_replace_intervals(self):
+        # https://github.com/pandas-dev/pandas/issues/35931
+        df = pd.DataFrame({"a": [pd.Interval(0, 1), pd.Interval(0, 1)]})
+        result = df.replace({"a": {pd.Interval(0, 1): "x"}})
+        expected = pd.DataFrame({"a": ["x", "x"]})
+        tm.assert_frame_equal(result, expected)

pandas/tests/scalar/interval/test_arithmetic.py

@@ -45,3 +45,15 @@ def test_numeric_interval_add_timedelta_raises(interval, delta):
 
     with pytest.raises((TypeError, ValueError), match=msg):
         delta + interval
+
+
+@pytest.mark.xfail(reason="https://github.com/pandas-dev/pandas/pull/35938")
+def test_timdelta_add_timestamp_interval():
+    delta = np.timedelta64(0)
+    expected = Interval(Timestamp("2020-01-01"), Timestamp("2020-02-01"))
+
+    result = delta + expected
+    assert result == expected
+
+    result = expected + delta
+    assert result == expected