code: def __init__(self):
      self.__db__ = DefaultOrderedDict(OrderedSet)
      self._names = set()
      self.name = None
  
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 2 to create a new DB object from inherited base classes: object with example: obj = DB()