############    udp协议    ###########

服务器

import socket

sk = socket.socket(type = socket.SOCK_DGRAM)         ##udp协议

sk.bind((ip地址,端口号))

while 1:

       msg_r,addr = sk.recvfrom(1024)                ##接收来自哪里的消息

       print(msg_r.decode('utf-8'),addr)              ##把收到的内容解码出来

       if msg_r.decode('utf-8')  == 'q':

              continue

       user = input('>>>')

       sk.sendto(user.encode('utf-8'),addr)

       if user == 'q':

             break

sk.close()

客户端:

import socket

sk = socket.socket(type = socket.SOCK_DGRAM)

while 1:

       mag = input('>>>>')

       sk.sendto(mag.encode('utf-8')(服务器ip地址,服务器那边的端口号)

       if mag == 'q':

             break

       mag_r,addr = sk.recvfrom(1024)

       print(mag_r.decode(''utf-8))

       if mag_r.decode() == 'q':

               break

################     时间同步机制     ####################

服务器:

import socket                     ##引进socket模块

import time                        ##引进时间模块

sk = socket.socket(type = socket.SOCK_DGRAM)     ##实例化    DGRAM 是udp  这个位置是固定的

sk.bind(ip地址,端口号)

while 1:

        tm_format,addr = sk.recvfrom(1024)     ##接收的是1024个字节

        tm_format = tm_format.decode('utf-8')  ##%Y/%m/%d %H:%M:%S

        local_tm = time.strftime(tm_format)      ##获取到了对应格式的当前时间

        sk.sendto(local_tm.encode('utf-8'),addr)   ##返回给客户端  

客户端:

import socket                        ##引入socket模块

import time                          ##引入time模块

sk = socket.socket(type = socket.SOCK_DGRAM)     ##udp协议固定的

tm_format = input('>>>')          ##输入

while 1:

       sk.sendto(tm_format.encode('utf-8'),(ip地址,端口号))     ##发送出去

       local_tm,addr = sk.recvfrom(1024)        ##接收1024个字节

       print(local_tm,decode('utf-8'))         ##解码

       time.sleep(2)                                 ##停顿2秒