code: def safe_no_dnn_algo_bwd(algo):
      """
      Make sure the user is not attempting to use dnn.conv.algo_bwd`.
      """
      if algo:
          raise RuntimeError(
              "The option `dnn.conv.algo_bwd` has been removed and "
              "should not be used anymore. Please use the options "
              "`dnn.conv.algo_bwd_filter` and `dnn.conv.algo_bwd_data` instead."
          )
      return True
  
imports: from __future__ import absolute_import, print_function, division
  import errno
  import os
  import sys
  import logging
  import numpy
  import platform
  import textwrap
  import re
  import socket
  import struct
  import warnings
  from six import string_types
  import theano
  from theano.configparser import AddConfigVar, BoolParam, ConfigParam, EnumStr, FloatParam, IntParam, StrParam, TheanoConfigParser, THEANO_FLAGS_DICT
  from theano.misc.cpucount import cpuCount
  from theano.misc.windows import call_subprocess_Popen, output_subprocess_Popen
  from theano.compat import maybe_add_to_os_environ_pathlist
label_desc: Use image node_id 7 for calling a global function with example usage: safe_no_dnn_algo_bwd(algo) and returns: True