准备用用tornado重写本站，但发现import tornado.database时出错。 代码如下: [rootlee ~]# python Python 2.7.4 (default, Apr 11 2013, 17:08:33) [GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2 Type “help”, “copyright”, “credits” or “license” for more information. >>&