Python socket 网络通信基础

UDP

先启动服务端再启动客户端，客户端可以多开，由于客户端没有指定端口号，每次都是随机的端口。
#服务端

import socket
import time
BUFSIZE = 1024
def main():
    ip_port = ('', 14554)
    #sock.SOCK_DGRAM是基于UDP
    #SOCK_STREAM是基于TCP
    server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    #服务端用于将把用于通信的地址和端口绑定到 socket 上
    server.bind(ip_port)

    while True:
        print('正在监听listening.....')
        #用来接收数据，BUFSIZE用来标识大小，最大字节数
        data, addr = server.recvfrom(BUFSIZE)
        print('Received frome {}:'.format(addr))
        print(data)
        response = b"Hello, this server1, I received: "
        #发送数据
        server.sendto(response + data, addr)
    server.close()
if __name__ == '__main__':
    main()

#客户端

import socket
import time
BUFSIZE = 1024
def main():
    client = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
    #指定目的端口号
    ip_port = ('127.0.0.1', 14554)
    client.sendto(b"hello this is udp client1",ip_port)
    data, addr = client.recvfrom(BUFSIZE)
    print("Received from: {}".format(addr))
    print(data)
    client.close()

if __name__ == '__main__':
    main()

做个记录学习使用。