网络编程

tcp编程代码如下：

服务器

import socket, threading, time


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('127.0.0.1', 9999))
s.listen(5)
print('waiting for connecting...')

def tcplink(sock, addr):
    print('Accept new connection from %s:%s...' % addr)
    sock.send(b'Welcome!')
    while True:
        data = sock.recv(1024)
        time.sleep(1)
        if not data or data.decode('utf-8') == 'exit':
            break
        sock.send(('Hello, %s!' % data.decode('utf-8')).encode('utf-8'))


    sock.close()
    print('Connection from %s:%s closed.' % addr)


while True:
    sock, addr = s.accept()
    t = threading.Thread(target=tcplink, args=(sock, addr))

    t.start()

客户端

import socket


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 9999))
print(s.recv(1024).decode('utf-8'))


for data in [b'Michael', b'Tracy', b'Sarah']:
    s.send(data)
    print(s.recv(1024).decode('utf-8'))
s.send(b'exit')

s.close()

udp编程代码如下：

服务器

import socket
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# 绑定端口:
s.bind(('127.0.0.1', 9999))
print('Bind UDP on 9999...')
while True:
    # 接收数据:
    data, addr = s.recvfrom(1024)
    print('Received from %s:%s.' % addr)

    s.sendto(b'Hello, %s!' % data, addr)

客户端

import socket


s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
for data in [b'Michael', b'Tracy', b'Sarah']:
    # 发送数据:
    s.sendto(data, ('127.0.0.1', 9999))
    # 接收数据:
    print(s.recv(1024).decode('utf-8'))

s.close()

参考资料：

https://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000/001432004977916a212e2168e21449981ad65cd16e71201000