Good news, I think.
“Today, there are very few libraries that do not support Python 3. Python 3 Readiness shows that 342 of the 360 top packages for Python support 3.x.” (Read more. A link-filled resource.)
I learned Python from Zed Shaw’s Learn Python the Hard Way, which predisposed me to use Python 2.x. Also, as a Mac OS user, I already have Python 2.x without downloading or installing anything. Little by little, though, I’ve started to do all new projects in Python 3.x.