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54 lines
1.6 KiB
54 lines
1.6 KiB
6 months ago
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import numpy as np
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from pandas import (
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DataFrame,
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Index,
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MultiIndex,
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Series,
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_testing as tm,
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)
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def test_get_dummies(any_string_dtype):
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s = Series(["a|b", "a|c", np.nan], dtype=any_string_dtype)
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result = s.str.get_dummies("|")
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expected = DataFrame([[1, 1, 0], [1, 0, 1], [0, 0, 0]], columns=list("abc"))
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tm.assert_frame_equal(result, expected)
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s = Series(["a;b", "a", 7], dtype=any_string_dtype)
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result = s.str.get_dummies(";")
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expected = DataFrame([[0, 1, 1], [0, 1, 0], [1, 0, 0]], columns=list("7ab"))
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tm.assert_frame_equal(result, expected)
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def test_get_dummies_index():
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# GH9980, GH8028
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idx = Index(["a|b", "a|c", "b|c"])
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result = idx.str.get_dummies("|")
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expected = MultiIndex.from_tuples(
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[(1, 1, 0), (1, 0, 1), (0, 1, 1)], names=("a", "b", "c")
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)
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tm.assert_index_equal(result, expected)
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def test_get_dummies_with_name_dummy(any_string_dtype):
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# GH 12180
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# Dummies named 'name' should work as expected
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s = Series(["a", "b,name", "b"], dtype=any_string_dtype)
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result = s.str.get_dummies(",")
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expected = DataFrame([[1, 0, 0], [0, 1, 1], [0, 1, 0]], columns=["a", "b", "name"])
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tm.assert_frame_equal(result, expected)
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def test_get_dummies_with_name_dummy_index():
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# GH 12180
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# Dummies named 'name' should work as expected
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idx = Index(["a|b", "name|c", "b|name"])
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result = idx.str.get_dummies("|")
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expected = MultiIndex.from_tuples(
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[(1, 1, 0, 0), (0, 0, 1, 1), (0, 1, 0, 1)], names=("a", "b", "c", "name")
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)
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tm.assert_index_equal(result, expected)
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