code: def laplace():
      return np.array(
          [[0.25, 0.5, 0.25], [0.5, -3.0, 0.5], [0.25, 0.5, 0.25]]
      ).astype(np.float32)[None, None, ...]
  
imports: import torch.nn
  import numpy
  import torch
label_desc: Use image node_id 1 for calling a global function with example usage: laplace() and returns: np