code: def unpack_one(t, ps, pattern):
      return unpack(t, ps, pattern)[0]
  
imports: from random import randrange
  import torch
  from torch import nn, einsum
  from torch.nn import Module, ModuleList
  import torch.nn.functional
  from einops import rearrange, repeat, pack, unpack
  from einops.layers.torch import Rearrange
label_desc: Use image node_id 3 for calling a global function with example usage: unpack_one(t, ps, pattern) and returns: unpack