如何检测和删除twisted中的死TCP连接？

from twisted.internet import reactor, protocol

class MyProtocol(protocol.Protocol):
    def connectionMade(self):
        # 新建连接时的操作
        pass
    
    def dataReceived(self, data):
        # 接收到数据时的操作
        pass
    
    def connectionLost(self, reason):
        # 连接断开时的操作
        pass

class MyFactory(protocol.Factory):
    def buildProtocol(self, addr):
        return MyProtocol()

# 存储所有的TCP连接对象
connections = []

def checkDeadConnections():
    for conn in connections:
        if conn.transport.disconnected or conn.transport.getTimeSinceLastActivity() > 60:
            conn.transport.loseConnection()
            connections.remove(conn)

# 每隔10秒检查一次死连接
reactor.callLater(10, checkDeadConnections)

# 启动Twisted服务
reactor.listenTCP(8000, MyFactory())
reactor.run()