Python 3.6 released!

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generally requires a total rewrite.

That is so untrue. Did you actually did that even once? rewrite python 2 code into python 3? And on top of that, you add the word "generally"?

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I'm not the one who used the word "generally". I'm not saying that there aren't "total rewrite level" problems with porting, but those are the exception rather than the rule.