if __name__=="__main__":
    s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
    s.bind(("",20123))
    s.listen(10)
    epoll=select.epoll()
    print s.fileno()
    print select.EPOLLIN|select.EPOLLET
    epoll.register(s.fileno(),select.EPOLLIN|select.EPOLLET)
    while 1:
        epoll_list=epoll.poll()
        for fd,events in epoll_list:
            print fd
            print events
            if fd==s.fileno():
                conn,addr=s.accept()
                print 123