code: def fake_evaluation(ctx, **kwargs):
      return {"auc": 0.9}
  
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 4 for calling a global function with example usage: fake_evaluation(ctx) and returns: dict