def modify(self, fd, events): epoll.epoll_ctl(self._epoll_fd, self._EPOLL_CTL_MOD, fd, events)
def unregister(self, fd): epoll.epoll_ctl(self._epoll_fd, self._EPOLL_CTL_DEL, fd, 0)
def register(self, fd, events): epoll.epoll_ctl(self._epoll_fd, self._EPOLL_CTL_ADD, fd, events)