code: def h2onetwork_test():
      """
      Python API test: h2o.network_test()
      Deprecated, use h2o.cluster().network_test().
      """
      ret = h2o.network_test()  # no return type
      assert ret is None
  
label_desc: Use image node_id 1 for calling a global function with example usage: h2onetwork_test() without return types