Moving from Python 2 to Python 3: A 4 page "cheat sheet"

Terry Reedy tjreedy at udel.edu
Tue Dec 1 16:55:50 EST 2009


Mark Summerfield wrote:
> I've produced a 4 page document that provides a very concise summary
> of Python 2<->3 differences plus the most commonly used new Python 3
> features. It is aimed at existing Python 2 programmers who want to
> start writing Python 3 programs and want to use Python 3 idioms rather
> than those from Python 2 where the idioms differ.
> 
> It uses Python 3.1 syntax since that looks like being the standard for
> a few years in view of the language moratorium.
> 
> The document is U.S. Letter size but will also print fine on A4
> printers.
> 
> It is available as a free PDF download (no registration or anything)
> from InformIT's website. Here's the direct link:
> http://ptgmedia.pearsoncmg.com/imprint_downloads/informit/promotions/python/python2python3.pdf
> 
> And of course, if you want more on Python 3, there's always the
> documentation---or my book:-)
> "Programming in Python 3 (Second Edition)" ISBN-10: 0321680561.

What might be even *more* helpful, with contributions from others 
perhaps, would be an indication of which changes are handled 
automatically by 2to3.py and which must be done by hand.

tjr




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