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 reorder_item(self, item, position):
    new_position = min(max(position, 0), len(self._items) - 1)