class_docstr: Op whose perform() raises an exception.
      
code: def perform(self, node, inputs, out_storage):
      raise self.exc(self.msg)
  
imports: from __future__ import absolute_import, print_function, division
  from theano import gof
label_desc: Use image node_id 4 for calling the Raise obj's underlying member method code with example usage: obj.perform(node, inputs, out_storage) without return types