code: def mode(request):
      return request.param
  
imports: from __future__ import annotations
  from io import BytesIO, StringIO
  import os
  import numpy
  import pytest
  import pandas.util._test_decorators
  from pandas import NA, DataFrame, Index
  import pandas._testing
  from pandas.io.common import get_handle
  from pandas.io.xml import read_xml
label_desc: Use image node_id 5 for calling a global function with example usage: mode(request) and returns: request