== 원본 ==
{{{~cpp 
import socket
from SocketServer import ThreadingTCPServer, StreamRequestHandler
import thread

PORT = 8037
lock = thread.allocate_lock()   # 상호 배제 구현을 위한 락 객체

class UsersList:
    def __init__(self):
        self.users = {}

    def __contains__(self, name):   # in 연산자 메쏘드
        return name in self.users

    def addUser(self, conn, addr, name):
        if name in self.users:
            conn.send('Already resistered name\n')
            return None
        lock.acquire()  # 상호 배제
        self.users[name] = (conn, addr)
        lock.release()
        # 각종 메시지 출력
        self.broadcastMessage('['+name+']' + ' entered\n')
        conn.send('[%s] Welcome!\n'%name)   # 본인에게 가는 메시지
        print len(self.users), 'connections'    # 서버에 표시되는 메시지
        return name

    def removeUser(self, name):
        if name not in self.users:
            return
        lock.acquire()  # 상호 배제
        del self.users[name]
        lock.release()
        self.broadcastMessage('['+name+'] '+' has gone!\n')
        print len(self.users), 'connections'    # 서버에 표시되는 메시지

    def handleMessage(self, name, msg):
        if msg[0] != '/':
            self.broadcastMessage('['+name+'] ' + msg)
            return
        cmd = msg[1:].rstrip().split()
        if cmd[0] == 'quit':
            self.removeUser(name)
            return -1
    def broadcastMessage(self, msg):
        for conn, addr in self.users.values():
            conn.send(msg)

class RequestHandler(StreamRequestHandler):
    users = UsersList()
    # 접속 요구가 들어오면 호출된다.
    def handle(self):
        print 'connection from', self.client_address
        #서버에 표시되는 메시지
        conn = self.request
        try:
            name = self.readAngRegisterName()
            data = self.receiveline()
            while data:
                if self.users.handleMessage(name, data) == -1:
                    conn.close()
                    break
                data = self.receiveline()
        except socket.error:
            print 'Socket Error'
        print 'Disconnected from', self.client_address
    #서버 메시지
        self.users.removeUser(name)

    #참여자 이름을 읽어서 등록한다
    def readAngRegisterName(self):
        while 1:
            self.request.send('Name ? ')
            name = self.receiveline().strip()   #이름 읽기
            if self.users.addUser(self.request, self.client_address, name):
                return name

    #한 라인을 읽어들인다.
    def receiveline(self):
        line = []
        while 1:
            data = self.request.recv(1024)
            line.append(data)
            if data[-1] == '\n':
                return ''.join(line)

# ============================================================
if __name__ == '__main__':
    server = ThreadingTCPServer(("", PORT), RequestHandler)
    print 'listening on port', PORT
    server.serve_forever()

}}}
== 수정 ==
{{{~cpp 
import socket  
from SocketServer import ThreadingTCPServer, StreamRequestHandler  
import thread  
  
PORT = 4444 
lock = thread.allocate_lock()   # 상호 배제 구현을 위한 락 객체  
  
class Users:  
    def __init__(self, aId, msg,addr, isinEntry = False): 
        self.ID = aID    
        self.message = msg 
##       self.conn = conn
        self.addr = addr 
        self.isinEntry 
  
#    def __contains__(self, name):   # in 연산자 메쏘드  
#        return name in self.users  
  
    def addUser(self):  
        if self.isinEntry:  
            self.send('Already resistered name\n')  
            return None  
        lock.acquire()  # 상호 배제 
        self.append(Users(self.ID, self.message, self.isinEntry)) 
        lock.release()  
        # 각종 메시지 출력  
        self.broadcastMessage('['+self.ID+']' + ' entered\n')  
        self.send('[%s] Welcome!\n'%self.ID)   # 본인에게 가는 메시지  
        print len(Users), 'connections'    # 서버에 표시되는 메시지  
        return self.ID 
  
    def removeUser(self):  
        if self.ID not in Users:  
            return  
        lock.acquire()  # 상호 배제  
        self.remove(Users) 
        lock.release()  
        self.broadcastMessage('['+self.ID+'] '+' has gone!\n')  
        print len(Users), 'connections'    # 서버에 표시되는 메시지  
  
    def handleMessage(self, msg):  
        if msg[0] != '/':  
            self.broadcastMessage('['+self.ID+'] ' + msg)  
            return  
        cmd = msg[1:].rstrip().split()  
#        if cmd[0] == 'quit':  
#            self.removeUser(name)  
#            return -1 
         
       # self.users[name] = (conn, addr)  
 
#    def broadcastMessage(self, msg):  
#        for conn, addr in Users:  
#            conn.send(msg)  
  
class RequestHandler(StreamRequestHandler):  
    # 접속 요구가 들어오면 호출된다. 
 
    def handle(self):
        
        print 'connection from', self.client_address # client address 
        #서버에 표시되는 메시지
        conn = self.request     # conn : object
        
        a = conn.recv(1024)
        u = Users(a.ID, a.message,self.client_address, a.isinEntry)
        u.addUser()
        conn.send(u.ID) 
        try:  
##            name = self.readAngRegisterName()  
            data = self.receiveline()  
            while data:  
                if self.users.handleMessage(data) == -1:  
                    conn.close()  
                    break  
                data = self.receiveline()  
        except socket.error:  
            print 'Socket Error'  
        print 'Disconnected from', self.client_address  
    #서버 메시지  
        u.remove(u) 
  
    #참여자 이름을 읽어서 등록한다 
         
##    def readAngRegisterName(self):  
##        while 1:  
##            self.request.send('Name ? ')  
##            name = self.receiveline().strip()   #이름 읽기  
##            if self.users.addUser(self.request, self.client_address, name):  
##                return name  
  
    #한 라인을 읽어들인다.  
    def receiveline(self):  
        line = []  
        while 1:  
            data = self.request.recv(1024)  
            line.append(data)  
            if data[-1] == '\n':  
                return ''.join(line)  
  
# ============================================================  
if __name__ == '__main__':  
    server = ThreadingTCPServer(("", PORT), RequestHandler)  
    print 'listening on port', PORT  
    server.serve_forever() 
}}}
== 재선 ==
{{{~cpp 
import socket  
from SocketServer import ThreadingTCPServer, StreamRequestHandler  
import thread  
  
PORT = 8037  
lock = thread.allocate_lock()   # 상호 배제 구현을 위한 락 객체  
class UsersList:  
    def __init__(self):  
        self.users = {}  
  
    def __contains__(self, name):   # in 연산자 메쏘드  
        return name in self.users  
  
    def addUser(self, conn, msg, name):  
        if name in self.users:  
            conn.send('Already resistered name\n')  
            return None  
        lock.acquire()  # 상호 배제  
        self.users[name] = (conn, msg)  
        lock.release()  
        # 각종 메시지 출력  
        self.broadcastMessage('['+name+']' + ' entered\n')  
        conn.send('[%s] Welcome!\n'%name)   # 본인에게 가는 메시지  
        print len(self.users), 'connections'    # 서버에 표시되는 메시지  
        return name  
 #('id' : (object, message)) 
    def removeUser(self, name):  
        if name not in self.users:  
            return  
        lock.acquire()  # 상호 배제  
        del self.users[name]  
        lock.release()  
        self.broadcastMessage('['+name+'] '+' has gone!\n')  
        print len(self.users), 'connections'    # 서버에 표시되는 메시지  
  
    def handleMessage(self, name, msg):  
        if msg[0] != '/':  
            self.broadcastMessage('['+name+'] ' + msg)  
            return  
        cmd = msg[1:].rstrip().split()  
        if cmd[0] == 'quit':  
            self.removeUser(name)  
            return -1  
    def broadcastMessage(self, msg):  
        for conn, addr in self.users.values():  
            conn.send(msg)  
  
class RequestHandler(StreamRequestHandler):  
    users = UsersList()  
    # 접속 요구가 들어오면 호출된다.  
    def handle(self):  
        print 'connection from', self.client_address  
        #서버에 표시되는 메시지  
        conn = self.request 

        try:  
            name = self.users.addUser(self.request, self.client_address, name)
            if name:
                conn.send(true)
            else:
                conn.send(false)
            
            data = self.receiveline()  
            while data:
                if self.users.handleMessage(name, data) == -1:  
                    conn.close()  
                    break  
                data = self.receiveline()  
        except socket.error:  
            print 'Socket Error'  
        print 'Disconnected from', self.client_address  
    #서버 메시지  
        self.users.removeUser(name)  
  
    #참여자 이름을 읽어서 등록한다  
##    def readAngRegisterName(self):  
##        while 1:  
##            self.request.send('Name ? ')  
##            name = self.receiveline().strip()   #이름 읽기  
##            if self.users.addUser(self.request, self.client_address, name):  
##                return name  
  
    #한 라인을 읽어들인다.  
    def receiveline(self):
        line = []
        while 1:
            data = self.request.recv(1024)
            line.append(data)
            if data[-1] == '\n':
                return ''.join(line)  
  
# ============================================================  
if __name__ == '__main__':  
    server = ThreadingTCPServer(("", PORT), RequestHandler)  
    print 'listening on port', PORT  
    server.serve_forever()  
}}}
{{{~cpp 
import tkSimpleDialog    
from Tkinter import *  
from socket import *   
  
      
class Main:       
    def __init__(self, aMaster, aUser, aSock):       
        self.frame = Frame(aMaster)  
#for show texts     
        self.showscrollbar = Scrollbar(aMaster)     
        self.showscrollbar.place(x = 550, y = 0, width = 50, height = 550)     
        self.show = Listbox(aMaster, yscrollcommand = self.showscrollbar.set)       
        self.show.place(x = 0, y = 0, width = 585, height = 550)     
        self.showscrollbar.config(command = self.show.yview)     
#for user list  
        self.listscrollbar = Scrollbar(aMaster)      
        self.listscrollbar.place(x = 800-50, y = 0, width = 50, height = 600)     
        self.list = Listbox(aMaster, yscrollcommand = self.listscrollbar.set)   
        self.list.place(x = 600, y = 0, width = 185, height = 600)     
        self.listscrollbar.config(command = self.list.yview)      
#for input a string   
        self.edit = Entry(aMaster)    
        self.edit.place(x = 0, y = 550 , width = 600 , height = 50)    
    def sendMessage(self, event):  
        aUser.message = self.edit.get()  
        self.edit.delete(0, END)  
        csock.send(aUser)  
        self.recieveMassage()  
    def recieveMassage(self):  
        user = aSock.recv(1024)  
        self.show(user)  
    def show(self, aUser):  
        self.show.insert(END, "< " + str(aUser.ID) + " > : " + str(aUser.message))  
  
    
class User:    
    def __init__(self, aID):    
        self.ID = aID    
        self.message = ''    
##        self.isinEntry = True  
          
                    
if __name__ == "__main__":       
    root = Tk()      
    root.configure( width = 800, height = 600)    
    login = tkSimpleDialog    
##    login.Place.place_configure( root, x = 100, y = 100) #position    
    
    csock = socket(AF_INET, SOCK_STREAM)  
    try:  
        csock.connect(('', 8037))#make socket, connect  
    except:  
        print 'connect refuse'  
##    csock.recv(1024)  
    ID = ''   
    while not ID:    
        ID = login.askstring(title = "Login", prompt="Enter ID", parent = root)   
        user = User(ID)    
        csock.send(user.ID)    
        registered= csock.recv(1024)
        if registered:
            continue
    else:   
        win = Main(root, user, csock)    
        root.bind("<Return>", win.sendMessage)  
        while True:  
            user = csock.recv(1024)  
        root.mainloop()  
}}}

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