code: def setactive(self, scriptname):
          
          code, data = self.__send_command(
              "SETACTIVE", [scriptname.encode("utf-8")])
          if code == "OK":
              return True
          return False
docs: Define the active script
  
          See MANAGESIEVE specifications, section 2.8
  
          If scriptname is empty, the current active script is disabled,
          ie. there will be no active script anymore.
  
          :param scriptname: script's name
          :rtype: boolean