It&#x27;s libraries rather than porting.<p>Funnily, though, I just thought &#x27;yeah there&#x27;s that library I use, they never ported that&#x27;, for one of my codebases. Just looked it up and they now have ported it. So I guess it&#x27;s time for me to do the same. I wonder what proportion of (actually used) libs are Py 2  only still.