code: def get(self, key):
      rcd = self._data.get(key, None)
      if not rcd:
          return None
      # do not delete the key to accelerate speed
      if rcd.expired(self._timeout):
          rcd.clear()
          return None
      return rcd.value
  
imports: import time
label_desc: Use image node_id 3 for calling the MemCache obj's underlying member method code with example usage: obj.get(key) and returns: rcd, None, None