code: def x1():
      return torch.tensor([[1, 2, 3], [4, 5, 6]], dtype=torch.float)
  
file_path: pykale/tests/utils/test_distance.py
imports: import pytest
  import torch
  from kale.utils.distance import calculate_distance, DistanceMetric
label_desc: Use image node_id 1 for calling a global function with example usage: x1() and returns: torch