mysql-python安装以后，仍然报错：ImportError: No module named mysqlDB

平台是debian7.7
python用的是2.7.3

用pip安装mysql-python显示成功

(youngTree)junjielee@debian:~$ sudo pip install mysql-python

Downloading/unpacking mysql-python

  Downloading MySQL-python-1.2.5.zip (108kB): 108kB downloaded

  Running setup.py (path:/tmp/pip_build_root/mysql-python/setup.py) egg_info for package mysql-python

    

Installing collected packages: mysql-python

  Running setup.py install for mysql-python

    building '_mysql' extension

    gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -Dversion_info=(1,2,5,'final',1) -D__version__=1.2.5 -I/usr/include/mysql -I/usr/include/python2.7 -c _mysql.c -o build/temp.linux-x86_64-2.7/_mysql.o -DBIG_JOINS=1 -fno-strict-aliasing -g

    In file included from _mysql.c:44:0:

    /usr/include/mysql/my_config.h:422:0: warning: "HAVE_WCSCOLL" redefined [enabled by default]

    In file included from /usr/include/python2.7/Python.h:8:0,

                     from _mysql.c:29:

    /usr/include/python2.7/pyconfig.h:890:0: note: this is the location of the previous definition

    gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/temp.linux-x86_64-2.7/_mysql.o -L/usr/lib/x86_64-linux-gnu -lmysqlclient_r -lpthread -lz -lm -lrt -ldl -o build/lib.linux-x86_64-2.7/_mysql.so

    

Successfully installed mysql-python

Cleaning up...

我的dist-packages已经有两个文件夹：MYSQLdb和MySQL_python-1.2.5-py2.7.egg-info

现在的问题是，我在python交互界面，import MYSQLdb显示错误如下：
>>> import mysqlDB
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named mysqlDB