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22 lines
664 B
22 lines
664 B
import numpy as np
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import pytest
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from pandas import DataFrame
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import pandas._testing as tm
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class TestSwapAxes:
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def test_swapaxes(self):
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df = DataFrame(np.random.randn(10, 5))
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tm.assert_frame_equal(df.T, df.swapaxes(0, 1))
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tm.assert_frame_equal(df.T, df.swapaxes(1, 0))
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def test_swapaxes_noop(self):
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df = DataFrame(np.random.randn(10, 5))
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tm.assert_frame_equal(df, df.swapaxes(0, 0))
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def test_swapaxes_invalid_axis(self):
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df = DataFrame(np.random.randn(10, 5))
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msg = "No axis named 2 for object type DataFrame"
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with pytest.raises(ValueError, match=msg):
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df.swapaxes(2, 5)
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