[root@lee ~]# 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.

>>> import tornado.web

>>> import tornado.database

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

ImportError: No module named database

>>>

網(wǎng)上不少教程明明寫的是這個(gè)模塊，怎么會(huì)提示找不到這個(gè)模塊呢？難道我沒有安裝MySQLdb的原因？

復(fù)制代碼代碼如下:

[root@lee tornado]# 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.

>>> import MySQLdb

>>>

MySQLdb模塊已經(jīng)裝好了，看來不是MySQLdb模塊引起的。我又重裝了一次tornado，結(jié)果還是沒有database模塊。

Python的模塊就是一個(gè)py文件，我倒tornado目錄去看了看，果然沒有database.py這個(gè)模塊：

復(fù)制代碼代碼如下:

[root@lee ~]# find /usr -name tornado 

/usr/lib/python2.6/site-packages/tornado-3.0.1-py2.6.egg/tornado

/usr/local/lib/python2.7/site-packages/tornado-3.0.1-py2.7.egg/tornado

/usr/local/lib/python2.7/site-packages/tornado

[root@lee ~]# cd /usr/local/lib/python2.7/site-packages/tornado

[root@lee tornado]# ls

auth.py              escape.pyc      __init__.pyc  netutil.pyc            tcpserver.py   web.pyc

auth.pyc             gen.py          ioloop.py     options.py             tcpserver.pyc  websocket.py

autoreload.py        gen.pyc         ioloop.pyc    options.pyc            template.py    websocket.pyc

autoreload.pyc       httpclient.py   iostream.py   platform               template.pyc   wsgi.py

ca-certificates.crt  httpclient.pyc  iostream.pyc  process.py             test           wsgi.pyc

concurrent.py        httpserver.py   locale.py     process.pyc            testing.py

concurrent.pyc       httpserver.pyc  locale.pyc    simple_httpclient.py   testing.pyc

curl_httpclient.py   httputil.py     log.py        simple_httpclient.pyc  util.py

curl_httpclient.pyc  httputil.pyc    log.pyc       stack_context.py       util.pyc

escape.py            __init__.py     netutil.py    stack_context.pyc      web.py

[root@lee tornado]#

于是到tornado官網(wǎng)看了看文檔，原來是tornado3.0版本以后廢除database模塊，但推出了一個(gè)類似database的模塊torndb，我看了下源碼基本就是MySQLdb的簡單封裝。
下載torndb，https://github.com/bdarnell/torndb
安裝：

復(fù)制代碼代碼如下:

[root@lee software]# unzip torndb-master.zip 

Archive:  torndb-master.zip

ab862d70f293304f3a37527dff549eb6818063f7

   creating: torndb-master/

  inflating: torndb-master/.gitignore  

  inflating: torndb-master/README.rst  

   creating: torndb-master/doc/

  inflating: torndb-master/doc/Makefile 

  inflating: torndb-master/doc/conf.py  

  inflating: torndb-master/doc/index.rst  

  inflating: torndb-master/setup.py  

  inflating: torndb-master/torndb.py  

  inflating: torndb-master/tox.ini   

[root@lee software]# cd torndb-master

[root@lee torndb-master]# ls

doc  README.rst  setup.py  torndb.py  tox.ini

[root@lee torndb-master]# python setup.py build

running build

running build_py

creating build

creating build/lib

copying torndb.py -> build/lib

[root@lee torndb-master]# python setup.py install

running install

running build

running build_py

running install_lib

copying build/lib/torndb.py -> /usr/local/lib/python2.7/site-packages

byte-compiling /usr/local/lib/python2.7/site-packages/torndb.py to torndb.pyc

running install_egg_info

Writing /usr/local/lib/python2.7/site-packages/torndb-0.1-py2.7.egg-info

[root@lee torndb-master]#

安裝好了試試能不能倒入torndb模塊

復(fù)制代碼代碼如下:

[root@lee torndb-master]# 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.

>>> import torndb

>>>

OK，搞定。
其實(shí)使用torndb與直接使用MySQLdb模塊操作數(shù)據(jù)庫都一樣，看個(gè)人喜好
關(guān)于torndb的文檔請看這里：http://torndb.readthedocs.org/en/latest/