code: def test_copy_cfg(self):
      cfg2 = copy.deepcopy(cfg)
      s = cfg.MODEL.TYPE
      cfg2.MODEL.TYPE = "dummy"
      assert cfg.MODEL.TYPE == s
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import copy
  import tempfile
  import unittest
  import yaml
  from detectron.core.config import cfg
  from detectron.utils.collections import AttrDict
  import detectron.core.config
  import detectron.utils.logging
label_desc: Use image node_id 1 for calling the TestCfg obj's underlying member method code with example usage: obj.test_copy_cfg() without return types