import pytest from pandas import IntervalIndex import pandas._testing as tm class TestPickle: @pytest.mark.parametrize("closed", ["left", "right", "both"]) def test_pickle_round_trip_closed(self, closed): # https://github.com/pandas-dev/pandas/issues/35658 idx = IntervalIndex.from_tuples([(1, 2), (2, 3)], closed=closed) result = tm.round_trip_pickle(idx) tm.assert_index_equal(result, idx)