python UDP

注意一点，socket.socket()的括号里不能像tcp一样为空

server.py:

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)

client.py:

import socket
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
for data in [b'Michael', b'Tracy', b'Sarah']:
    # 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()

output:

Hello, Michael!
Hello, Tracy!
Hello, Sarah!