This might seem very petty, but I avoid python just because of the dichotomy between Python 2 and Python 3. For me, there are plenty of other scripting languages at my disposal, and for things like numpy, or twisted, I have better alternatives too.
I'm using 2.7, and I can't recall the existence of 3 ever causing a problem.
The language is in active development, although it is still early days with library support currently lacking (namely, a good plotting library).
I know, it's a terrible language, but it is a great collection of capabilities. Quintessential example of love/hate.
I'm not certain what sort of graphics work you are considering, but if it involves a lot of nonlinearity or higher level functions, it may be a good fit.
Do you avoid Ruby and Perl because each other exist?
Avoid JS because jQuery and mootools both exist?
tl;dr: I don't think the Python2/3 : jQuery/mootools analogy is that fitting.
On the other hand, I still happily use Python(2) for some things, but that is primarily because of familiarity and awesome tools like what was mentioned in the article (namely Theano and pandas). Once the Rust language becomes more stable, I hope to move most of my development to that.
Your analogy breaks on a number of levels.
And I believe Python 2.7 still receives security updates when needed.
Obviously this depends on what libraries are useful to you, but of the common libraries that people talk about, most of them do support Python 3. Numpy, matplotlib, Django & PyQt, for example, all do.
But Python 2.x IS frozen at 2.7 because of 3.