code: def _assert_different_pointers_to_param_grad(a, b):
      assert isinstance(a, chainer.Link)
      assert isinstance(b, chainer.Link)
      a_params = dict(a.namedparams())
      b_params = dict(b.namedparams())
      assert set(a_params.keys()) == set(b_params.keys())
      for key in a_params.keys():
          assert isinstance(a_params[key], chainer.Variable)
          assert isinstance(b_params[key], chainer.Variable)
          assert (
              a_params[key].grad.ctypes.data
              != b_params[key].grad.ctypes.data
          )
  
imports: import multiprocessing
  import os
  import signal
  import sys
  import unittest
  import warnings
  import chainer
  import chainer.links
  from chainer import optimizers
  import copy
  import numpy
  import chainerrl
  from chainerrl.misc import async_
label_desc: Use image node_id 3 for calling a global function with example usage: _assert_different_pointers_to_param_grad(a, b) without return types