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