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import pytest from pandas import Series import pandas._testing as tm class TestStrAccessor: def test_str_attribute(self): # GH#9068 methods = ["strip", "rstrip", "lstrip"] ser = Series([" jack", "jill ", " jesse ", "frank"]) for method in methods: expected = Series([getattr(str, method)(x) for x in ser.values]) tm.assert_series_equal(getattr(Series.str, method)(ser.str), expected) # str accessor only valid with string values ser = Series(range(5)) with pytest.raises(AttributeError, match="only use .str accessor"): ser.str.repeat(2) def test_str_accessor_updates_on_inplace(self): ser = Series(list("abc")) return_value = ser.drop([0], inplace=True) assert return_value is None assert len(ser.str.lower()) == 2
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