code: def count_grad_elements(params, zero_fill):
      if zero_fill:
          return sum(param.data.size for param in params)
      else:
          return sum(param.grad.size for param in params)
  
imports: import ctypes
  import mpi4py.MPI
  import numpy
  from chainermn.communicators import _communication_utility
  import chainer.backends
  import chainerx
label_desc: Use image node_id 4 for calling a global function with example usage: count_grad_elements(params, zero_fill) and returns: sum, sum