code: def test_validate(self):
      try:
          MyOp(
              Generic()(), MyType(1)()
          )  # MyOp requires MyType instances
          raise Exception("Expected an exception")
      except Exception as e:
          if str(e) != "Error 1":
              raise
  
imports: from __future__ import absolute_import, print_function, division
  import unittest
  from nose.plugins.skip import SkipTest
  import numpy
  import theano
  import theano.gof.op
  from six import string_types
  from theano.gof.type import Type, Generic
  from theano.gof.graph import Apply, Variable
  import theano.tensor
  from theano import scalar
  from theano import shared
label_desc: Use image node_id 2 for calling the TestOp obj's underlying member method code with example usage: obj.test_validate() without return types