IO多路复用

import socket
sk = socket.socket()
sk.bind((‘127.0.0.1‘,8080))
sk.listen()
sk.setblocking(False)
lst = []
del_lst = []
while 1:
    try:
        conn,address = sk.accept()
        lst.append(conn)
    except BlockingIOError:
        for conn in lst:
            try:
                dat = conn.recv(1024).decode(‘utf-8‘)
                if not dat:
                    del_lst.append(conn)
                    print(‘客户端正常关闭‘)
                    conn.close()
                else:
                    print(dat)
                    conn.send(dat.upper().encode(‘utf-8‘))
            except ConnectionResetError :
                continue
            except BlockingIOError:
                pass
        if del_lst:
            for i in del_lst:
                lst.remove(i)
            del_lst.clear()

import socket
sk = socket.socket()
sk.connect((‘127.0.0.1‘, 8080))
while 1:
    word = input(‘>>>‘)
    if word == ‘q‘:
        break
    sk.send(word.encode(‘utf-8‘))
    info = sk.recv(1024).decode(‘utf-8‘)
    print(info)

sk.close()