database.py 文件源码

def list(cursor):
        now = time.time()
        timeout = config.getint('session', 'timeout')
        res = Database._list_cache
        if res and abs(Database._list_cache_timestamp - now) < timeout:
            return res
        cursor.execute('SHOW DATABASES')
        res = []
        for db_name, in cursor.fetchall():
            try:
                database = Database(db_name).connect()
            except Exception:
                continue
            cursor2 = database.cursor()
            if cursor2.test():
                res.append(db_name)
                cursor2.close(close=True)
            else:
                cursor2.close()
                database.close()
        Database._list_cache = res
        Database._list_cache_timestamp = now
        return res