code: def test_no_prefix_string_cats_basic_mixed_bool_values():
      dummies = DataFrame(
          {
              "a": [1, 0, 0, 1],
              "b": [False, True, False, False],
              "c": [0, 0, 1, 0],
          }
      )
      expected = DataFrame({"": ["a", "b", "c", "a"]})
      result = from_dummies(dummies)
      tm.assert_frame_equal(result, expected)
  
imports: import numpy
  import pytest
  from pandas import DataFrame, Series, from_dummies, get_dummies
  import pandas._testing
label_desc: Use image node_id 22 for calling a global function with example usage: test_no_prefix_string_cats_basic_mixed_bool_values() without return types