On Ubuntu 10.04 I recently installed Python 2.7.1 (ActivePython from ActiveState). I use meld to diff code and had no issues with Python 2.6.5, but after moving to 2.7.1 I get the following error when I execute meld:

Meld requires pygtk 2.8.0 or higher

Looking in Synaptic Package Manager, I have python-gtk2 installed which I believe maps to pygtk, but since meld cannot find it, does that mean it is installed for 2.6.5?

If I run the following:

pip install pygtk

I get:

ImportError: No module named dsextras

dsextras seems to be part of PyGObject but if I try to do:

pip install pygobject

I get an error that indicates that this type of installation is only supported on Windows:

Not supported, ok [y/N]? Error:
distutils build only supported on
windows

What's the recommended way of migrating to a newer Python version? Is it possible to import the packages from 2.6.5 into 2.7.1 or do I risk running into compatibility issues?