#服务端代码

 

import socket, threadingimport time'''#服务端 TCP连接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)if __name__ == '__main__':    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)    s.bind(('localhost', 9999))    s.listen(5)    print('Waiting for connecting ...')# while True:    sock, addr = s.accept()    t = threading.Thread(target=tcplink, args=(sock, addr))    t.start()'''# 服务端UDPif __name__ == '__main__':    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)

 

 

　

 

 

# 客户端代码

import socket# tcp连接# 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'Micheal', b'Tracy', b'Sarah']:#     s.send(data)#     print(s.recv(1024).decode('utf-8'))# s.send(b'exit')# s.close()## udp连接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()