first commit

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

@@ -0,0 +1,53 @@
+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)