code: def test_out_file_core():
      out_file_eg = logger.out_file_core()
      assert isinstance(out_file_eg, str)
  
file_path: pykale/tests/utils/test_logger.py
imports: import logging
  import os
  import pytest
  from kale.utils import logger
label_desc: Use image node_id 5 for calling a global function with example usage: test_out_file_core() without return types