code: def adadelta_eps_decay(eps_decay):
      """Extension to perform adadelta eps decay.
  
      Args:
          eps_decay (float): Decay rate of eps.
  
      Returns:
          An extension function.
  
      """
      from chainer import training
  
      @training.make_extension(trigger=(1, "epoch"))
      def adadelta_eps_decay(trainer):
          _adadelta_eps_decay(trainer, eps_decay)
  
      return adadelta_eps_decay
  
imports: import argparse
  import copy
  import json
  import logging
  import os
  import shutil
  import tempfile
  import numpy
  import torch
label_desc: Use image node_id 3 for calling a global function with example usage: adadelta_eps_decay(eps_decay) and returns: adadelta_eps_decay