code: def test_conll(self):
      db = Conll2003Loader().load("data_for_tests/io/conll2003")
      print(db)
  
file_path: fastNLP/tests/io/loader/test_conll_loader.py
imports: import pytest
  import os
  from fastNLP.io.loader.conll import MsraNERLoader, PeopleDailyNERLoader, WeiboNERLoader, Conll2003Loader, ConllLoader
label_desc: Use image node_id 1 for calling the TestConllLoader obj's underlying member method code with example usage: obj.test_conll() without return types