code: def rand(self, shape):
      return self.move((torch.rand(shape) - 0.5) * 2)
  
imports: import random
  import time
  from collections import OrderedDict
  import numpy
  import torch
label_desc: Use image node_id 15 for calling the TestDecorator obj's underlying member method code with example usage: obj.rand(shape) and returns: self