Basic knowledge of Python programming practice _007

Practice content: Socket,io multiplexing, Python Selectors library for simple group chat.

1. Service-side Code

1 __author__='Orcsir'2 ImportSelectors3 ImportThreading4 ImportSocket5  fromCollectionsImportNamedtuple6 7 8 classChatserver:9     def __init__(Self, ip="0.0.0.0", port=9527):TenSELF.ADDR =(IP, port) OneSelf.sock =Socket.socket () ASelf.selector =selectors. Defaultselector () -Self.data = Namedtuple ("Data", ["Callback","Datagram"]) -  the     defStart (self): - Self.sock.bind (SELF.ADDR) - Self.sock.listen () - self.sock.setblocking (False) +Self.selector.register (Self.sock, selectors. Event_read, Self.data (self.accept, b"")) -Threading. Thread (Target=self.select, name="Select"). Start () +  A     defSelect (self): at          whileTrue: -             Try: -Events =Self.selector.select () -             except: - self.stop () -                 return in  -              forKey, MaskinchEvents: todata =Key.data +callback =Data.callback -Datagram =Data.datagram the Callback (Key.fileobj, mask, datagram) *  $     defAccept (self, sock:socket.socket, mask, data):Panax Notoginsengconn, raddr =sock.accept () - conn.setblocking (False) theSelf.selector.register (conn, selectors. Event_read |selectors. Event_write, Self.data (self.recv_send, data)) +  A     #Processing Data Reception the     def_process_recv (self, Conn:socket.socket, mask): +         Try: -data = CONN.RECV (1024) $         except: $ Self.selector.unregister (conn) - conn.close () -             return the  -         ifData:Wuyi              forKeyinchSelf.selector.get_map (). VALUES (): the                 ifKey.fileobj! =Self.sock: -Datagram ="From {}. Contents: {}". Format (Conn.getpeername (), Data.decode ()). Encode () Wu self.selector.modify (key.fileobj, selectors. Event_write, Self.data (self.recv_send, datagram)) -         Else: About Self.selector.unregister (conn) $ conn.close () -  -     #Handling Data Sending -     def_process_send (self, conn:socket.socket, mask, datagram:bytes): A conn.send (datagram) +SELF.SELECTOR.MODIFY (conn, selectors. Event_read, Self.data (Self.recv_send, b"")) the  -     #Distribution Functions $     defrecv_send (self, conn:socket.socket, mask, datagram:bytes): the         ifMask &selectors. Event_read: the SELF._PROCESS_RECV (conn, mask) the         elifMask &selectors. Event_write: the Self._process_send (conn, mask, datagram) -  in     defStop (self): theConnects = [] the         ifSelf.selector.get_map (): About              forKeyinchSelf.selector.get_map (). VALUES (): the connects.append (key.fileobj) the  the          forConninchconnects: + Self.selector.unregister (conn) - conn.close () the self.selector.close ()Bayi  the  the if __name__=='__main__': -CS =Chatserver () - Cs.start () the      whileTrue: thecmd = input (">>>") the         ifCmd.strip () = ="quit": the cs.stop () -              Break

2. Client code

1 __author__='Orcsir'2 3 ImportSocket4 ImportThreading5 ImportLogging6 7FORMAT ="% (message) s"8Logging.basicconfig (Format=format, level=logging.info)9 Ten  One classchatclient: A     def __init__(Self, ip="127.0.0.1", port=9527): -Self.sock =Socket.socket () -SELF.RADDR =(IP, port) the  -     defStart (self): - Self.sock.connect (SELF.RADDR) -Threading. Thread (TARGET=SELF._RECV, name="recv"). Start () +  -     def_recv (self): +          whileTrue: A             Try: atdata = SELF.SOCK.RECV (1024) -             except: - self.sock.close () -                 return -             ifData: -Logging.info ("recv: {}". Format (Data.decode ())) in             Else: - self.sock.close () to                 return +  -     defSend (self, data:str): the Self.sock.send (Data.encode ()) *  $     defStop (self):Panax Notoginseng         ifSelf.sock: - self.sock.close () the  +  A defMain (): theCC =chatclient () + Cc.start () -      whileTrue: $cmd = input (">>>") $         ifCmd.strip () = ="quit": - cc.stop () -             return the cc.send (cmd) - WuyiMain ()

3. Start two Ipython analog clients

Basic knowledge of Python programming practice _007