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I am trying to learn GTK+3 as per this site: https://python-gtk-3-tutorial.readthedocs.org/en/latest/install.html. From the page:
1.1. Dependencies
GTK+3
Python 2 (2.6 or later) or Python 3 (3.1 or later)
gobject-introspection
The easiest way to install PyGObject from s...