code: def gaussian_likelihood(x, x_pred):
      """Compute Gaussian likelihood."""
      return -torch.sum(F.mse_loss(x_pred, x, reduction="none"))
  
imports: import matplotlib
  import matplotlib.pyplot
  import numpy
  import torch
  import torch.nn
  import torch.nn.functional
  from torch.autograd import Variable
  from torch.nn import Linear
  import os
label_desc: Use image node_id 6 for calling a global function with example usage: gaussian_likelihood(x, x_pred) and returns: unknown