参考下面的代码:

from socket import *

host = "localhost" # 对方地址
port = 20000 # 对方端口
address = (host, port)

bufSize = 1024

udpCliSock = socket(AF_INET, SOCK_DGRAM)

while True:
    data = input("> ")
    if not data:
        break
    # 把数据发送到指定的 udp 服务器
    udpCliSock.sendto(data.encode("utf-8"), address)


udpCliSock.close()