>python2.7
Python 2.7.3 (default, Jul 28 2012, 16:54:06)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gtk
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named gtk

tiger@debian:~$ python
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gtk
>>> import pygtk
>>> import gobject

sudo pip install PyGTK

$ virtualenv -p /usr/bin/python2.7 .

$ sudo pip install PyGTK

pip install PyGTK

brew install pygtk

sudo apt-get install python-gtk2-dev

conda install -c ostrokach gtk