Server初见——python

import socket
phone = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
phone.bind(('127.0.0.1',8080))
phone.listen(5)  #半连接池，调试时还要测试
conn,addr = phone.accept()
print('双相连接是',conn)
print('客户端地址是',addr)
while True:
    msg = conn.recv(1024)
    print('客户端发来的消息是：',msg)
    conn.send(msg.upper())
conn.close()
phone.close()