code: def network(self):
      from urllib.request import urlopen
  
      try:
          urlopen("http://www.baidu.com", timeout=3)
          return True
      except Exception as err:
          return False
  
imports: import ray
  from bigdl.dllib.nncontext import init_spark_on_yarn
  from bigdl.orca.ray import OrcaRayContext
label_desc: Use image node_id 4 for calling the TestRay obj's underlying member method code with example usage: obj.network() and returns: True, False