python 脚本模拟tcp和udp客户端

import socket
import time

# client
#tcp客户端
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#udp客户端
#client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
client.connect(('192.168.0.123', 7007))
print("connect localhost 7007 ...")

while True:
    #sendbuf = "{\"a\":8,\"b\":9}'\0'"
    sendbuf = "{\"a\":8,\"b\":9}'\0'"
    print("send :", sendbuf)
    client.send(sendbuf.encode('utf-8'))
    if not sendbuf or sendbuf == 'exit':
        break
    time.sleep(1)

client.close()
print('Connection was closed...')