> I write all of my side projects in Python 3.4. I only write 2.7 because I work on Openstack at my day job. And that's the issue.You cant be a pro pythonist

> I write all of my side projects in Python 3.4. I only write 2.7 because I work on Openstack at my day job. And that's the issue.You cant be a pro pythonist unless you know both,even if you prefer 3.x .Not saying 2.x is an entire different language.Still,Python devs have to know the differences between both versions.