code: def forward(self, tensor):
      return batch_per_image_standardization(tensor)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 2 for calling the PerImageStandardize obj's underlying member method code with example usage: obj.forward(tensor) and returns: batch_per_image_standardization