Presenting symptom: autogen disables the build of slideshowshuffle and pythonconsole, reporting "no python support." Platform is Ubuntu 9.04, Jaunty Jackalope; Gnome 2.26.1.
Log extract:
checking for a Python interpreter with version >= 2.3... python
checking for python... /usr/bin/python
checking for python version... 2.6
checking for python platform... linux2
checking for python script directory... ${prefix}/lib/python2.6/site-packages
checking for python extension module directory... ${exec_prefix}/lib/python2.6/site-packages
checking for PYGTK... no
configure: WARNING: Python not found, disabling python support
Evidence that both python and pygtk are installed:
Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pygtk
>>>
I note the capitalization of PYGTK, which is common for environment variables. There is no PYGTK environment variable.
Your search - "PYGTK environment variable" - did not match any documents.
A grep for PYGTK in the tree rooted from /usr/share/doc/python-gtk2-doc/html returned no rows.