code: def build_items(self):
          u
          protocols = ['tcp', 'tcp6']
          for protocol in protocols:
              procfile = open('/proc/net/{0}'.format(protocol), 'r')
              stats = self.count(procfile)
  
              for key, value in stats.items():
                  item = NetstatItem(key=key,
                                     value=value,
                                     host=self.hostname
                                     )
  
                  self.queue.put(item, block=False)
docs: u"""This method called by Executer.
          /proc/net/tcp -> {host:host, key:key, value:value, clock:clock}