code: def test_differences():
      both, a_only, b_only = sets.differences([1, 2, 3], [1, 4, 5])
      assert both == [1]
      assert a_only == [2, 3]
      assert b_only == [4, 5]
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_differences() without return types