Inzynierka/Lib/site-packages/pandas/tests/strings/test_get_dummies.py

54 lines
1.6 KiB
Python
Raw Permalink Normal View History

2023-06-02 12:51:02 +02:00
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)