udp 套接字编程

from socket import *


serverName = 'server.kunxiang.wang'
serverPort = 12000


clientSocket = socket(AF_INET, SOCK_DGRAM)

# 如果不绑定客户端进程端口，则自动选择端口
clientSocket.bind(('', 34567))

msg = input('please input lowercase sentence: ').encode()
clientSocket.sendto(msg, (serverName, serverPort))

modifiedMsg, serverAddress = clientSocket.recvfrom(2048)

print(modifiedMsg, serverAddress, end='n')

clientSocket.close()

from socket import *
serverPort = 12000
serverSocket = socket(AF_INET, SOCK_DGRAM)
serverSocket.bind(('', serverPort))
print('The server is ready to receive')
while True:
    message, clientAddress = serverSocket.recvfrom(2048)
    print(message)
    print(clientAddress)
    modifiedMessage = message.upper()
    serverSocket.sendto(modifiedMessage, clientAddress)