CPython 3

[Vlad-Shcherbina]

One really minor concern. With python 2, releases almost never happen nowadays, and it pretty much ensures that everyone who is not coming back from a millennium of cryogenic suspension is running exactly the same version. With python 3, there are 3.4.0, 3.4.3, 3.5rc*, etc. floating around. I don't think it manifested in different behaviors in practice, though.

Besides that, can't really think of anything bad with 3. Strict bytes/string distinction is controversial topic, but was not a problem in practice, was it?

I even came to terms with putting parenthesis after print (although I am still convinced that both print statement and print function were language design mistakes).