[successbox title=”UDP协议”]
UDP协议同样是建立在IP协议之上的。但是UDP协议面向无连接的通信协议，不保证数据包的顺利到达，不可靠传输，所以效率比TCP要高。
[/successbox]

1.服务端：
[sourcecode language=”python” title=”demo18.py”]
import socket
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind((‘127.0.0.1’, 8888))
print(‘Bind UDP on 8888’)
while True:
#接受数据
data, addr = s.recvfrom(1024)
print(‘Received from %s: %s.’ % addr)
print(‘received:’, data)
p = data.decode(‘utf-8’).split(",")
x = int(p[0])
y = int(p[1])
print(p[0],p[1])
pos = str(x + 1) + "," + str(y+1)
s.sendto(pos.encode(‘utf-8’), addr)
[/sourcecode]
2.客户端：
[sourcecode language=”python” title=”demo18.py”]
import socket
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
x = input("请输入X坐标")
y = input("请输入Y坐标")
data = str(x) + "," + str(y)
s.sendto(data.encode(‘utf-8’), (‘127.0.0.1’, 8888))
#接受服务器加1后的坐标数据
data2, addr = s.recvfrom(1024)
print("接受服务器加1后坐标数据：", data2.decode(‘utf-8’))
s.close()
[/sourcecode]
效果图：