title: importerror: No module named django
body: <p>I installed python 2.6 alongside my mac's 2.5.2 version. As soon as I did, python2.6 manage.py runserver failed because it couldn't find django.core.management.</p>
  
  <p>From a shell, import django returns importerror: No module named django.</p>
  
  <p>Why?</p>