from
http://www.pygtk.org/pygtktutorial/ch-introduction.html
###
This tutorial is based on:
GTK+ 1.2.9
Python 1.5.2
PyGTK 0.6.6 (part of PyGNOME 1.0.53)
###
gtk+1 and gtk+2 are not compatible.
read
http://www.pygtk.org/pygtk2tutorial/ch-TextViewWidget.html