code: def test_file(filename):
      return os.path.join(TEST_DATA_DIR, filename)
  
file_path: pytext/tests/data_utils.py
imports: import os
  from enum import Enum
  from typing import List, NamedTuple, Optional
  from pytext.utils.path import PYTEXT_HOME
label_desc: Use image node_id 1 for calling a global function with example usage: test_file(filename) and returns: os