code: def get_default_mode():
      return get_mode(None)
  
imports: from __future__ import absolute_import, print_function, division
  import logging
  import warnings
  import theano
  from theano import gof
  import theano.gof.vm
  from theano import config
  from six import string_types
  from theano.compile.function_module import Supervisor
label_desc: Use image node_id 4 for calling a global function with example usage: get_default_mode() and returns: get_mode