code: def __hash__(self):
      if not hasattr(self, "_optimizer_idx"):
          self._optimizer_idx = opt._optimizer_idx[0]
          opt._optimizer_idx[0] += 1
      return self._optimizer_idx
  
imports: from __future__ import absolute_import, print_function, division
  import copy
  import sys
  from theano.compat import DefaultOrderedDict
  from theano.misc.ordered_set import OrderedSet
  from six import StringIO, integer_types
  from theano.gof import opt
  from theano import config
label_desc: Use image node_id 1 for calling the DB obj's underlying member method code with example usage: obj.__hash__() and returns: self