code: def __init__(self, in_subs, out_sub):
      self.in_subs = in_subs
      self.out_sub = out_sub
  
imports: import warnings
  import chainer
  from chainer import backend
  from chainer.backends import cuda
  from chainer import function_node
  from chainer import utils
  from chainer.utils import argument
  from chainer.utils import type_check
label_desc: Use image node_id 1 to create a new EinSum object from inherited base classes: function_node with example: obj = EinSum(in_subs, out_sub)