database.py 文件源码

def connect(self):
        """ Connect to the database, return True on success. """
        with self.num_connections_lock:
            assert self.num_connections >= 0
            self.num_connections += 1
            if self.num_connections == 1:
                try:
                    self.database.connect()
                    if DEBUG:
                        LOG.debug("[db] Database connected")
                except OperationalError as exc:
                    _DbConnector.log_error("connect", exc)
                    self.num_connections -= 1
                    return False
        return True