code: def forward(self, x):
      if x.sum() > 1000:
          return self.left(x)
      else:
          return self.right(x)
  
imports: import math
  import sys
  import pytest
  import torch
  import torch.nn
  import torch.nn
  from fairscale.internal import torch_version
label_desc: Use image node_id 2 for calling the Branch obj's underlying member method code with example usage: obj.forward(x) and returns: self, self