def connect(self): 
        try:
            self.connection = pymongo.Connection(self.host, self.port)
            self.db = self.connection[self.name]
        except AutoReconnect:
            raise DatabaseException("It's not possible connect to the database")
def closeEvent(self, event: QCloseEvent):
        settings.write("{}/geometry".format(self.__class__.__name__), self.saveGeometry())
        super().closeEvent(event)