code: def unify_walk(ov, o, U):
      """
      The unification succeeds iff other_object in OrV.options.
  
      """
      if o in ov.options:
          v = BoundVariable("?", o)
          return U.merge(v, ov)
      else:
          return False
  
imports: from __future__ import absolute_import, print_function, division
  from copy import copy
  from functools import partial
  from theano.gof.utils import ANY_TYPE, comm_guard, FALL_THROUGH, iteritems
label_desc: Use image node_id 5 for calling a global function with example usage: unify_walk(ov, o, U) and returns: U, False