《计算机网络-自顶向下(中文第六版)P108》-基于python3单台主机的UDP（客户机/服务机）实验

            from socket import *
serverName = "192.128.3.204"
serverPort = 12000
clientSocket = socket(AF_INET,SOCK_DGRAM)
message = input("Input lowercase sentence:")
message = message.encode()
clientSocket.sendto(message, (serverName, serverPort))
modifiedMessage,serverAddress = clientSocket.recvfrom(2048)
modifiedMessage = modifiedMessage.decode()
print(modifiedMessage)
print(serverAddress)
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)
   modifiedMessage = message.upper()
   serverSocket.sendto(modifiedMessage,clientAddress)