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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)
|
|
