code: def append(self, x):
      data = pt.cat([self.data, x], dim=2)
      self.data = data.narrow(
          2, data.size(2) - self.maxlen, self.maxlen
      )
  
imports: from typing import List, Optional
  from collections import deque
  import math
  import torch
  from torch import Tensor
  from torch import nn
  from torch.distributions import Distribution
  from torch.distributions import Normal
label_desc: Use image node_id 4 for calling the DilatedQueue obj's underlying member method code with example usage: obj.append(x) without return types