code: def test_categorical_dtype_utf16(all_parsers, csv_dir_path):
      # see gh-10153
      pth = os.path.join(csv_dir_path, "utf16_ex.txt")
      parser = all_parsers
      encoding = "utf-16"
      sep = "\t"
  
      expected = parser.read_csv(pth, sep=sep, encoding=encoding)
      expected = expected.apply(Categorical)
  
      actual = parser.read_csv(
          pth, sep=sep, encoding=encoding, dtype="category"
      )
      tm.assert_frame_equal(actual, expected)
  
imports: from io import StringIO
  import os
  import numpy
  import pytest
  from pandas._libs import parsers
  from pandas.core.dtypes.dtypes import CategoricalDtype
  import pandas
  from pandas import Categorical, DataFrame, Timestamp
  import pandas._testing
label_desc: Use image node_id 6 for calling a global function with example usage: test_categorical_dtype_utf16(all_parsers, csv_dir_path) without return types