code: def infer_shape(self, input, *args):
      self.cell.infer_shape(0, input, False)
  
imports: import copy
  import numpy
  import mxnet
  from mxnet import gluon
  from mxnet.test_utils import *
  from mxnet.base import _as_list
  from collections import defaultdict
  from mxnet.attribute import AttrScope
label_desc: Use image node_id 3 for calling the RNNLayer obj's underlying member method code with example usage: obj.infer_shape(input) without return types