#创建基于UDP的socket连接
import socket

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
#绑定端口
s.bind((\'127.0.0.1\', 9999))

print(\'Bind UDP on 9999...\')
while True:
    #接收数据
    data, addr = s.recvfrom(1024)
    print(\'Received from %s:%s.\' % addr)
    s.sendto(b\'Hello, %s!\' % data, addr)

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
for data in [b\'Alice\', b\'Bob\', b\'Jack\']:
    #发送数据
    s.sendto(data, (\'127.0.0.1\', 9999))
    #接收数据
    print(s.recv(1024).decode(\'utf-8\'))
s.close()

udp_server.py结果：
Bind UDP on 9999...
Received from 127.0.0.1:60136.
Received from 127.0.0.1:60136.
Received from 127.0.0.1:60136.

udp_client.py结果：
Hello, Alice!
Hello, Bob!
Hello, Jack!