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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