import pytest
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from pandas import (
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Index,
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MultiIndex,
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Series,
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)
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import pandas._testing as tm
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class TestSeriesRenameAxis:
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def test_rename_axis_mapper(self):
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# GH 19978
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mi = MultiIndex.from_product([["a", "b", "c"], [1, 2]], names=["ll", "nn"])
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ser = Series(list(range(len(mi))), index=mi)
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result = ser.rename_axis(index={"ll": "foo"})
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assert result.index.names == ["foo", "nn"]
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result = ser.rename_axis(index=str.upper, axis=0)
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assert result.index.names == ["LL", "NN"]
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result = ser.rename_axis(index=["foo", "goo"])
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assert result.index.names == ["foo", "goo"]
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with pytest.raises(TypeError, match="unexpected"):
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ser.rename_axis(columns="wrong")
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def test_rename_axis_inplace(self, datetime_series):
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# GH 15704
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expected = datetime_series.rename_axis("foo")
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result = datetime_series
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no_return = result.rename_axis("foo", inplace=True)
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assert no_return is None
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tm.assert_series_equal(result, expected)
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@pytest.mark.parametrize("kwargs", [{"mapper": None}, {"index": None}, {}])
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def test_rename_axis_none(self, kwargs):
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# GH 25034
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index = Index(list("abc"), name="foo")
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ser = Series([1, 2, 3], index=index)
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result = ser.rename_axis(**kwargs)
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expected_index = index.rename(None) if kwargs else index
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expected = Series([1, 2, 3], index=expected_index)
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tm.assert_series_equal(result, expected)
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