code: def test_get_fun_msg():
      # 测试运行
      def demo(x):
          pass
  
      print(_get_fun_msg(_get_fun_msg))
  
file_path: fastNLP/tests/core/utils/test_utils.py
imports: from functools import partial
  import pytest
  from fastNLP.core.utils.utils import auto_param_call, _check_valid_parameters_number, _get_fun_msg
  from fastNLP.core.metrics import Metric
label_desc: Use image node_id 2 for calling a global function with example usage: test_get_fun_msg() without return types