code: def test_data_import(self):
      from bigdl.orca.data import file, transformer
  
file_path: BigDL/python/orca/test/bigdl/orca/test_import.py
imports: from unittest import TestCase
  import pytest
  from bigdl.orca import init_orca_context, stop_orca_context
label_desc: Use image node_id 3 for calling the TestImport obj's underlying member method code with example usage: obj.test_data_import() without return types