code: def ntp_config(self, ntp_opt):
          
          ret = self.command(
              'configManager.cgi?action=setConfig&{0}'.format(ntp_opt)
          )
          return ret.content.decode('utf-8')
docs: ntp_opt is the NTP options listed as example below:
  
          NTP.Address=clock.isc.org
          NTP.Enable=false
          NTP.Port=38
          NTP.TimeZone=9
          NTP.UpdatePeriod=31
  
          ntp_opt format:
          <paramName>=<paramValue>[&<paramName>=<paramValue>...]