select —— poll —— epoll

import socket,select
s=socket.socket()
s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
s.bind((‘127.0.0.1‘,6666))
s.listen()
poll=select.poll()
poll_dict={s.fileno():s}
def a(fd):
    poll.unregister(fd)
    poll_dict[fd].close()
    del poll_dict[fd]

def main():
    poll.register(s,select.POLLIN | select.POLLERR)
    while True:
        p=poll.poll()
        for fd,event in p:
            if fd == s.fileno():
                con, addr = s.accept()
                poll.register(con, select.POLLIN | select.POLLERR)
                poll_dict[con.fileno()]=con
            elif event == select.POLLIN:
                date=poll_dict[fd].recv(1024)
                if not date:
                    a(fd)
                    continue
                print(date.decode(),111)
                poll_dict[fd].send(date)
            elif event == select.POLLERR:
                a(fd)
if __name__ == ‘__main__‘:
    main()

import socket,selectors
s=socket.socket()
s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
s.bind((‘127.0.0.1‘,6666))
s.listen()
epoll=selectors.DefaultSelector()
def accept_(s):
    con,addr=s.accept()
    epoll.register(con,selectors.EVENT_READ,recv_)

def recv_(con):
    try:
        date=con.recv(1024)
        if not date:
            raise ‘‘
        print(date.decode())
        con.send(date)
    except:
        epoll.unregister(con)
        con.close()
        print(‘断开连接‘)

def main():
    epoll.register(s,selectors.EVENT_READ,accept_)
    while True:
        s_eoll=epoll.select()
        for key,event in s_eoll:
            ac=key.data   #这是文件指针accept_
            print(key,‘这是KEY‘)
            ac(key.fileobj)
if __name__ == ‘__main__‘:
    main()