Problems importing in python

I am super new in python and I just deploy an open source application that was executed in python and I get:

ImportError: cannot import name DataSource on from django.contrib.gis.gdal import DataSource

However, this is fine:

import django.contrib.gis.gdal

My current environment setting:

• Linux
• Python 2.7 installed in / opt / python
• GDAL installed using easy_install, for example, like this: '/ opt / python / bin / easy_install GDAL'
• Run # 3 looks like it's installed here: '/opt/python/lib/python2.7/site-packages/GDAL-1.7.1-py2.7.egg-info'

Can someone help me here please?

If I could do import django.contribs.gis.gdal, then why DataSourcenot import? I suppose it is DataSourcealso part of the GDAL library?