python3 类型Type str doesn't support the buffer API?，python3buffer,饿，代码是抄书的，书是《

python3 类型Type str doesn't support the buffer API?，python3buffer,饿，代码是抄书的，书是《

饿，代码是抄书的，书是《python基础教程》，由于书的代码是python2,的，但是我又想学python3，所以自己改了一下代码，遇到了一些问题 先补上图片

#!/usr/bin/env python3__author__ = 'tcstory'from asyncore import dispatcherfrom asynchat import async_chatimport socket, asyncorePORT=5005NAME='TestChat'class EndSession(Exception): passclass CommandHandler:    '''    Simple command handler similar to cmd.Cmd from the standard library    '''    def unknown(self, session, cmd):        'Respond to an unknown command'        session.push('Unkonw command: {0}\r\n'.format(cmd).encode())    def handle(self, session, line):        'Handle a received line from a given session'        if not line.strip():            return        #Split off the command        parts = line.split(' ', 1)        cmd = parts[0]        try:            line=parts[1].strip()        except IndexError:            line=''        #Try to find a handler        meth=getattr(self,'do_'+cmd,None)        try:            #Assume it's callable            meth(session,line)        except TypeError:            #If it isn't ,respond to the unknown command            self.unknown(session,cmd)class Room(CommandHandler):    '''    A generic environment that may contain one or more users(sessions).it takes care of basic command handling and broadcasting.    '''    def __init__(self,server):        self.server=server        self.sessions=[]    def add(self,session):        'A session(user) has entered the room'        self.sessions.append(session)    def remove(self,session):        'A session (user) has left the room'        self.sessions.remove(session)    def broadcast(self,line):        'Send a line to all sessions in the room'        for session in self.sessions:            session.push(line.encode())    def do_logout(self,session,line):        'Respond to the logout command'        raise EndSessionclass LoginRoom(Room):    '''    A room meant for a single person who has just connected    '''    def add(self,session):        Room.add(self,session)        #When a user enters,greet him/her        self.broadcast('Welcome to {0}\r\n'.format(self.server.name))    def unknown(self, session, cmd):        #All unknown commands (anything except login or logout)        #results in a prodding        session.push('Please log in\nUse "login <nick>"\r\n'.encode())    def do_login(self,session,line):        name=line.strip()        #Make sure the user has entered a name        if not name:            session.push('Please enter a name\r\n'.encode())        #Make sure that the name isn't in use        elif name in self.server.users:            session.push('The name {0} is taken.\r\n'.format(name).encode())            session.push('Please try again.\r\n'.encode())        else:            #The name is OK,os it is stored in the session.and            #the user is moved into the main room            session.name=name            session.enter(self.server.main_room)class ChatRoom(Room):    '''    A room meant for multiple users who can chat with the others in the room    '''    def add(self,session):        #Notify everyone that a new user has entered        self.broadcast('{0} has entered the room.\r\n'.format(session.name))        self.server.users[session.name]=session        Room.add(self,session)    def remove(self,session):        Room.remove(self,session)        #Notify everyone that a user has left        self.broadcast('{0} has left the room.\r\n'.format(session.name))    def do_say(self,session,line):        self.broadcast('{0}: '+line+'\r\n'.format(session.name))    def do_look(self,session,line):        'Handles the look command,used to see who is in a room'        session.push('The following are in this room:\r\n'.encode())        for other in self.sessions:            session.push('{0}\r\n'.format(other.name).encode())    def do_who(self,session,line):        'Handles the who command ,used to see who is logged in'        session.push('The following are logged in:\r\n'.encode())        for name in self.server.users:            session.push('{0}\r\n'.format(name))class LogoutRoom(Room):    '''    A simple room for a single user.Its sole purpose is to remove the user's name from the server    '''    def add(self,session):        #When a session (user) enters the LogoutRoom it is deleted        try:            del self.server.users[session.name]        except KeyError:            passclass ChatSession(async_chat):    '''    A single session,which takes care of the communication with a single user    '''    def __init__(self,server,sock):        # async_chat.__init__(self,sock)        super().__init__(sock)        self.server=server        self.set_terminator('\r\n')        self.data=[]        self.name=None        #All sessions begin in a separate LoginRoom        self.enter(LoginRoom(server))    def enter(self,room):        # Remove self from current room and add self to next room....        try:            cur=self.room        except AttributeError:pass        else:            cur.remove(self)        self.room=room        room.add(self)    def collect_incoming_data(self, data):        self.data.append(data)    def found_terminator(self):        line=''.join(self.data)        self.data=[]        try:            self.room.handle(self,line)        except EndSession:            self.handle_close()    def handle_close(self):        async_chat.handle_close(self)        self.enter(LogoutRoom(self.server))class ChatServer(dispatcher):    '''    A chat server with a single room    '''    def __init__(self,port,name):        super().__init__()        # dispatcher.__init__(self)        self.create_socket(socket.AF_INET,socket.SOCK_STREAM)        self.set_reuse_addr()        self.bind(('',port))        self.listen(5)        self.name=name        self.users={}        self.main_room=ChatRoom(self)    def handle_accept(self):        conn,addr=self.accept()        ChatSession(self,conn)if __name__=='__main__':# www.iplaypy.com 百度搜：编橙之家    s=ChatServer(PORT,NAME)    try:        asyncore.loop()    except KeyboardInterrupt:        print()

这是stackoverflow上的问题，老外帮我改了一下，可能阅读效果更好
http://stackoverflow.com/questions/24928908/python3-type-str-doesnt-support-the-buffer-api

编橙之家文章，