Python-确定用户是服务器还是客户端

我正在写一个程序，需要两台电脑之间的通信。我知道如何相互连接和发送消息。当用户打开程序时，它应该监听连接。但是，如果用户单击“连接”，程序应该停止侦听连接，转而连接到用户。我应该如何做到这一点？
我现在就知道了：

MAIN

@threaded
def getOnline(self):
   # fires when the user opens the program
    client.connect(PORT)

@threaded
def connect(self):
    # when the user clicks connect
    global IS_MASTER
    IS_MASTER = True
    print('Master:', IS_MASTER)
    if IS_MASTER:
        client.closeConnection()
        server.connect(CLIENT_IP, PORT)

class Client():

    def __init__(self):
        self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    def connect(self, port):
        print('Listening to connections')
        self.s.bind(('', port))
        self.s.listen(1)
        conn, addr = self.s.accept()
        print('Connected by:', addr)

    def closeConnection(self):
        print('Not listening any longer')
        self.s.close()
        sys.exit()

客户端

@threaded
def getOnline(self):
   # fires when the user opens the program
    client.connect(PORT)

@threaded
def connect(self):
    # when the user clicks connect
    global IS_MASTER
    IS_MASTER = True
    print('Master:', IS_MASTER)
    if IS_MASTER:
        client.closeConnection()
        server.connect(CLIENT_IP, PORT)

class Client():

    def __init__(self):
        self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    def connect(self, port):
        print('Listening to connections')
        self.s.bind(('', port))
        self.s.listen(1)
        conn, addr = self.s.accept()
        print('Connected by:', addr)

    def closeConnection(self):
        print('Not listening any longer')
        self.s.close()
        sys.exit()

服务器

class Server():

    def __init__(self):
        self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    def connect(self, host, port):
        self.s.connect((host, port))
        print('Connected to:', host)

现在，当我单击“连接”时，我得到：“ConnectionAbortedError:[Errno 53]软件导致连接中止”

任何帮助都将不胜感激

编辑
完全回溯

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/threading.py", line 639, in _bootstrap_inner
    self.run()
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/threading.py", line 596, in run
    self._target(*self._args, **self._kwargs)
  File "/Users/cedricgeerinckx/Dropbox/Redux/OSX/Redux.py", line 28, in wrapped_f
    ret = f(*args, **kwargs)
  File "/Users/cedricgeerinckx/Dropbox/Redux/OSX/Redux.py", line 204, in getOnline
    client.connect(PORT)
  File "/Users/cedricgeerinckx/Dropbox/Redux/OSX/Client.py", line 14, in connect
    conn, addr = self.s.accept()
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/socket.py", line 135, in accept
    fd, addr = self._accept()

---

该异常将在启动时运行的

getOnline

方法中抛出。这意味着当在该方法中建立的连接被

connect

方法关闭时，会发生异常。您应该在

getOnline

中处理异常：

@threaded
def getOnline(self):
   # fires when the user opens the program
    try:
        client.connect(PORT)
    except ConnectionAbortedError as e:
        print("Connection shut down!")

---

什么是完整的回溯？添加到问题服务器

bind

，

listen

和

accept

，客户端

connect

。你的

客户端

类正在监听一个端口（服务器就是这样做的），而你的

服务器

类正在主动连接到一个给定的地址/端口（客户端就是这样做的）。呜呜，谢谢你指出这一点！非常感谢。将更频繁地在我的代码周围添加try块！