title: python 3.x no module named sqlalchemy after installation
body: <p>I'm trying to install sqlalchemy to interact with mysql database for my python 3.x with ubuntu 12.04, but then when I import the sqlalchemy it says no module named sqlalchemy. This is what i did with installation:</p>
  
  <pre><code>aoi@aoi:~$ sudo apt-get install python3-sqlalchemy
  [sudo] password for aoi: 
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following packages were automatically installed and are no longer required:
  libgio-cil libmono-corlib4.0-cil libmono-system-security4.0-cil libmono-system-xml4.0-  cil libmono-i18n-west4.0-cil cli-common guile-1.8-libs
  libmono-system-configuration4.0-cil librhythmbox-core5 mono-runtime libgdu-gtk0  libavahi-ui-gtk3-0 mono-4.0-gac mono-gac
  linux-headers-3.5.0-23-generic libglib2.0-cil linux-headers-3.5.0-23 libming1 thunderbird-globalmenu libmusicbrainz3-6 libmono-i18n4.0-cil
  libmono-security4.0-cil libmono-system4.0-cil
  Use 'apt-get autoremove' to remove them.
   Suggested packages:
   python-sqlalchemy-doc
   The following NEW packages will be installed:
   python3-sqlalchemy
   0 upgraded, 1 newly installed, 0 to remove and 81 not upgraded.
   Need to get 450 kB of archives.
   After this operation, 2,808 kB of additional disk space will be used.
   Get:1 http://ph.archive.ubuntu.com/ubuntu/ precise-updates/main python3-sqlalchemy all   0.7.4-1ubuntu0.1 [450 kB]
   Fetched 450 kB in 40s (11.0 kB/s)                                                                                                                    
   Selecting previously unselected package python3-sqlalchemy.
   (Reading database ... 346102 files and directories currently installed.)
   Unpacking python3-sqlalchemy (from .../python3-sqlalchemy_0.7.4-1ubuntu0.1_all.deb) ...
   Setting up python3-sqlalchemy (0.7.4-1ubuntu0.1) ...
  </code></pre>
  
  <p>Did I do something wrong?</p>