code: def calc_mse(x: torch.Tensor, y: torch.Tensor):
      """
      Calculates the mean square error between tensors `x` and `y`.
      """
      return torch.mean((x - y) ** 2)
  
label_desc: Use image node_id 1 for calling a global function with example usage: calc_mse(x, y) and returns: torch