code: def intersperse(lst, item):
      result = [item] * (len(lst) * 2 + 1)
      result[1::2] = lst
      return result
  
imports: import math
  import numpy
  import torch
  from torch import nn
  from torch.nn import functional
label_desc: Use image node_id 4 for calling a global function with example usage: intersperse(lst, item) and returns: result