code: def forward(self, input_):
      return reduce(self.lambda_func, self.forward_prepare(input_))
  
imports: import torch
  import torch.nn
  from torch.autograd import Variable
  from functools import reduce
label_desc: Use image node_id 1 for calling the LambdaReduce obj's underlying member method code with example usage: obj.forward(input_) and returns: reduce