服务端：
import socket server=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
server.bind(('127.0.0.1',8080)) while True:
res,client_addr=server.recvfrom(1024)
# print(data)
server.sendto(res.upper(),client_addr)
客户端：
import socket client=socket.socket(socket.AF_INET,socket.SOCK_DGRAM) while True:
msg=input('>> ').strip()
client.sendto(msg.encode('utf-8'),('127.0.0.1',8080)) res,server_addr=client.recvfrom(1024)
print(res)
udp协议不会粘包：
服务端：
import socket server=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
server.bind(('127.0.0.1',8080)) res1,client_addr=server.recvfrom(1024) #b'hello'
print(res1) res2,client_addr=server.recvfrom(1024) #b'wolrd'
print(res2) res3,client_addr=server.recvfrom(1024) #b'oldboy123456'
print(res3)
客户端：
import socket
client=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
client.sendto('hello'.encode('utf-8'),('127.0.0.1',8080))
client.sendto('wolrd'.encode('utf-8'),('127.0.0.1',8080))
client.sendto('oldboy123456'.encode('utf-8'),('127.0.0.1',8080))
打印结果：
b'hello'
b'wolrd'
b'oldboy123456'
udp是无链接的，先启动哪一端都不会报错