code: def test_check_Xy_invalid_dtype_y():
      if sys.version_info > (3, 0):
          expect = (
              "y must be an integer array. Found <U1. "
              "Try passing the array as y.astype(np.int_)"
          )
      else:
          expect = (
              "y must be an integer array. Found |S1. "
              "Try passing the array as y.astype(np.int_)"
          )
      assert_raises(
          ValueError,
          expect,
          check_Xy,
          X,
          np.array(["a", "b", "c", "d"]),
      )
  
imports: import os
  import sys
  import numpy
  from mlxtend.utils import assert_raises, check_Xy, format_kwarg_dictionaries
label_desc: Use image node_id 7 for calling a global function with example usage: test_check_Xy_invalid_dtype_y() without return types