How to decide (and know) which Python GTK version to use?

[Chris Green]

I want to decide which is the 'best' Python GTK to use on my Linux
(xubuntu) systems.  There seem to be quite a few versions of Python
GTK bindings out there and I'm confused!  

I wrote a Python GUI program a little while ago that uses Python GTK
with:-

    import gtk

I *think* this is probably GTK 2, or something.  I can't find the
proper documentation for this.  Is it old/obsolescent?


I'm just starting to write another program now and I seem to be using
GTK 3 (maybe!) by doing:-

    import gi
    gi.require_version('Gtk', '3.0')
    from gi.repository import Gtk

Is this the right/best place to be?


I know this is a bit of a "how long is a piece of string" question but
some guidance would be very welcome.  The stuff I write is purely for
my own use and will only ever run on Linux (mostly xubuntu but also
some other Debian derived systems such as Rasbian and Debian on
Beaglebone).

-- 
Chris Green
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