code: def encoding_fmt(request):
      """
      Fixture for all possible string formats of a UTF encoding.
      """
      return request.param
  
imports: from __future__ import annotations
  import os
  import pytest
  from pandas.compat._optional import VERSIONS
  from pandas import read_csv, read_table
  import pandas._testing
label_desc: Use image node_id 10 for calling a global function with example usage: encoding_fmt(request) and returns: request