从前有个聊天室（socket&threading）

服务器端：

# -*- coding: utf-8 -*-
import socket, threading

con = threading.Condition()
HOST = raw_input("input the server's ip adrress: ") # Symbolic name meaning all available interfaces
PORT = 8888 # Arbitrary non-privileged port
data = ''
 
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print 'Socket created'
s.bind((HOST, PORT))
s.listen(10)
print 'Socket now listening'
 
#Function for handling connections. This will be used to create threads
def clientThreadIn(conn, nick):
    global data
#infinite loop so that function do not terminate and thread do not end.
    while True:
    #Receiving from client
        try:
            temp = conn.recv(1024)
            if not temp:
                conn.close()
                return
            NotifyAll(temp)
            print data
        except:
            NotifyAll(nick + " leaves the room!")
            print data
            return
 
    #came out of loop
 
def NotifyAll(sss):
    global data
    if con.acquire():
        data = sss
        con.notifyAll()
        con.release()
  
def ClientThreadOut(conn, nick):
    global data
    while True:
        if con.acquire():
            con.wait()          #notifyAll effect there
            if data:
                try:
                    conn.send(data)
                    con.release()
                except:
                    con.release()
                    return
                     
 
while 1:
    #wait to accept a connection - blocking call
    conn, addr = s.accept()
    print 'Connected with ' + addr[0] + ':' + str(addr[1])
    nick = conn.recv(1024)
    #send only takes string
    #start new thread takes 1st argument as a function name to be run, second is the tuple of arguments to the function.
    NotifyAll('Welcome ' + nick + ' to the room!')
    print data
    print str((threading.activeCount() + 1) / 2) + ' person(s)!'
    conn.send(data)
    threading.Thread(target = clientThreadIn , args = (conn, nick)).start()
    threading.Thread(target = ClientThreadOut , args = (conn, nick)).start()
 
s.close()

客户端：

# -*- coding: utf-8 -*-
import socket, threading

inString = ''
outString = ''
nick = ''
 
def DealOut(s):
    global nick, outString
    while True:
        outString = raw_input()
        outString = nick + ': ' + outString
        s.send(outString)
 
def DealIn(s):
    global inString
    while True:
        try:
            inString = s.recv(1024)
            if not inString:
                break
            if outString != inString:
                print inString
        except:
            break

nick = raw_input("input your nickname: ")
ip = raw_input("input the server's ip adrress: ")
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((ip, 8888))
sock.send(nick)
 
thin = threading.Thread(target = DealIn, args = (sock,))
thin.start()
thout = threading.Thread(target = DealOut, args = (sock,))
thout.start()

我把服务器端代码放到我在阿里云买的服务器上运行后在本地运行客户端程序（ip输入服务器ip）即可进行聊天室程序：

服务器端：

两个客户端：