code: def assertError(self, *args, **kwargs):
      self.assertRaises(getopt.GetoptError, *args, **kwargs)
  
file_path: cpython/Lib/test/test_getopt.py
imports: from test.support.os_helper import EnvironmentVarGuard
  import doctest
  import unittest
  import getopt
label_desc: Use image node_id 2 for calling the GetoptTests obj's underlying member method code with example usage: obj.assertError() without return types