There are a good amount of dependencies that haven&#x27;t been ported to 3 yet.  Using one of these directly, or as a secondary dependency, is the reason running 3 in prod is impractical for many of us.<p><a href="http:&#x2F;&#x2F;py3readiness.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;py3readiness.org&#x2F;</a>