class_docstr: Op whose perform() raises an exception.
      
code: def __str__(self):
      return "Raise{%s(%s)}" % (self.exc, self.msg)
  
imports: from __future__ import absolute_import, print_function, division
  from theano import gof
label_desc: Use image node_id 2 for calling the Raise obj's underlying member method code with example usage: obj.__str__() and returns: unknown