code: def forward(self, input):
      return self.lambda_func(self.forward_prepare(input))
  
imports: from __future__ import print_function, division, absolute_import
  import torch
  import torch.nn
  from torch.autograd import Variable
  from functools import reduce
label_desc: Use image node_id 2 for calling the Lambda obj's underlying member method code with example usage: obj.forward(input) and returns: self