Nipype uses sourceforge for our code hosting. For immediate access to the source code, see the nipype developer wiki.
For information on coding style, writing documentation, writing tests or using nipy tools, please see the NIPY developer resources site.
To access the source code you need subversion. You can check out the current trunk with the following command:
svn co https://nipy.svn.sourceforge.net/svnroot/nipy/nipype/trunk/ nipype
Then change into the source directory and install nipype:
cd nipype
python setup.py install