http://ubuntuforums.org/showthread.php?t=857320
libglib2.0-dev
pycairo
http://cairographics.org/pycairo/
http://www.pygtk.org/downloads.html
You need libglib2.0-dev (use synaptic to install it).
pygobject-2.0libglib2.0-dev
pycairo
http://cairographics.org/pycairo/
http://www.pygtk.org/downloads.html