from pandas import (
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DataFrame,
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Index,
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Series,
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)
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import pandas._testing as tm
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|
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class TestToFrame:
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def test_to_frame_respects_name_none(self):
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# GH#44212 if we explicitly pass name=None, then that should be respected,
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# not changed to 0
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# GH-45448 this is first deprecated & enforced in 2.0
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ser = Series(range(3))
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result = ser.to_frame(None)
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exp_index = Index([None], dtype=object)
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tm.assert_index_equal(result.columns, exp_index)
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result = ser.rename("foo").to_frame(None)
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exp_index = Index([None], dtype=object)
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tm.assert_index_equal(result.columns, exp_index)
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def test_to_frame(self, datetime_series):
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datetime_series.name = None
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rs = datetime_series.to_frame()
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xp = DataFrame(datetime_series.values, index=datetime_series.index)
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tm.assert_frame_equal(rs, xp)
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datetime_series.name = "testname"
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rs = datetime_series.to_frame()
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xp = DataFrame(
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{"testname": datetime_series.values}, index=datetime_series.index
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)
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tm.assert_frame_equal(rs, xp)
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rs = datetime_series.to_frame(name="testdifferent")
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xp = DataFrame(
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{"testdifferent": datetime_series.values}, index=datetime_series.index
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)
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tm.assert_frame_equal(rs, xp)
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def test_to_frame_expanddim(self):
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# GH#9762
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class SubclassedSeries(Series):
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@property
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def _constructor_expanddim(self):
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return SubclassedFrame
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class SubclassedFrame(DataFrame):
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pass
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ser = SubclassedSeries([1, 2, 3], name="X")
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result = ser.to_frame()
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assert isinstance(result, SubclassedFrame)
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expected = SubclassedFrame({"X": [1, 2, 3]})
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tm.assert_frame_equal(result, expected)
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