s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) 

# # 创建套接字
# udpSocket = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)

import socket
# 设置socket
udpSocket = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
# 设置目的端口和IP
sendArr = ('192.168.31.174',65535)
sendData = input('请输入你要发送的信息')
# 发送数据,此处有一个坑是sendto（）里面的参数必须二进制数据，不能直接传字符串
udpSocket.sendto(sendData.encode('utf-8'),sendArr)

udpSocket.close()

import socket
# 创建UDP套接字

udpSocket = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
# 绑定端口号
udpSocket.bind(("", 7789))
recvData = udpSocket.recvfrom(1024)
content, destInfo = recvData

print("content is %s"%content)
print("content is %s"%content.decode("utf-8"))

print(recvData)
udpSocket.close()