code: def split_data(dataframe_input, num_fold):
      """fake split data"""
      for i in range(num_fold):
          yield dataframe_input, dataframe_input
  
file_path: FATE/python/fate/components/components/cross_validation_test.py
imports: import logging
  import typing
  from fate.components.core import ARBITER, GUEST, HOST, Role, cpn, params
label_desc: Use image node_id 3 for calling a global function with example usage: split_data(dataframe_input, num_fold) without return types