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import numpy as np import pytest from pandas import ( NA, Categorical, Series, ) import pandas._testing as tm @pytest.mark.parametrize( "keep, expected", [ ("first", Series([False, False, True, False, True], name="name")), ("last", Series([True, True, False, False, False], name="name")), (False, Series([True, True, True, False, True], name="name")), ], ) def test_duplicated_keep(keep, expected): ser = Series(["a", "b", "b", "c", "a"], name="name") result = ser.duplicated(keep=keep) tm.assert_series_equal(result, expected) @pytest.mark.parametrize( "keep, expected", [ ("first", Series([False, False, True, False, True])), ("last", Series([True, True, False, False, False])), (False, Series([True, True, True, False, True])), ], ) def test_duplicated_nan_none(keep, expected): ser = Series([np.nan, 3, 3, None, np.nan], dtype=object) result = ser.duplicated(keep=keep) tm.assert_series_equal(result, expected) def test_duplicated_categorical_bool_na(): # GH#44351 ser = Series( Categorical( [True, False, True, False, NA], categories=[True, False], ordered=True ) ) result = ser.duplicated() expected = Series([False, False, True, True, False]) tm.assert_series_equal(result, expected)
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