code: def run(self):
      return self.opt
  
imports: import sys
  import unittest
  from unittest.mock import patch
  from parlai.core.params import ParlaiParser
  import parlai.core.script
  import parlai.utils.testing
label_desc: Use image node_id 2 for calling the _TestScript obj's underlying member method code with example usage: obj.run() and returns: self