用Python实现点对点的聊天，2个程序，一个是client.py，一个是server.py，通过本机地址127.0.0.1连接进行通信，利用多线程把发送消息和接收消息分开独立进行。

client代码：

import socketimport sysimport threadingimport time class client(): def __init__(self): self.s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) self.ip = "127.0.0.1" def connect(self): try: self.s.connect((self.ip,8888)) print("connect success") print('connect time: '+time.ctime()) except ConnectionError: print('connect error') sys.exit(-1) except: print('unexpect error') sys.exit(-1) def send_sth(self): while True: sth=input('say something:\n') try: self.s.sendall(sth.encode('utf-8')) except ConnectionError: print('connect error') sys.exit(-1) except: print('unexpect error') sys.exit(-1) def receive(self): while True: try: r=self.s.recv(1024) print ('get message:'+r.decode('utf-8')) except ConnectionError: print('connect error') sys.exit(-1) except: print('unexpect error') sys.exit(-1) c1 = client()c1.connect()threading._start_new_thread(c1.receive,())c1.send_sth()

server代码：

import socketimport sysimport threadingimport time def server(): def bind(): HOST='127.0.0.1' s.bind((HOST,8888)) print("bind ok") def listen(): s.listen(10) print ('Socket now listening') def send_sth(conn): while True: try: sth=input('say something:\n') conn.sendall(sth.encode('utf-8')) except ConnectionError: print('connect error') sys.exit(-1) except: print('unexpect error') sys.exit(-1) def recv(conn): while True: try: data=conn.recv(1024) data2=data.decode('utf-8') print('get message:'+data2) except ConnectionError: print('connect error') sys.exit(-1) except: print('unexpect error') sys.exit(-1) s=socket.socket(socket.AF_INET,socket.SOCK_STREAM) bind() listen() conn,addr=s.accept() print("connect success") print('connect time: '+time.ctime()) threading._start_new_thread(recv,(conn,)) send_sth(conn) if __name__=='__main__': server()

开启多线程有2种方法，上面2个程序都是用函数的方法，还有一种方法是用类继承threading类

代码：

import socketimport threadingclass client(threading.Thread): def __init__(self,sth): threading.Thread.__init__(self) self.sth=sth def run(self): s=socket.socket(socket.AF_INET,socket.SOCK_STREAM) ip="127.0.0.1" try: s.connect((ip,8888)) except : print('con error') exit() #print("connect success") s.sendall(self.sth.encode('utf-8')) #print("send success") try: r=s.recv(1024) except: print('recv error') exit() print (r.decode('utf-8'))c1=client('hello 1')c1.start()c2=client('hello 2')c2.start()

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