[Python-Dev] PEP 479: Change StopIteration handling inside generators (original) (raw)

Chris Angelico rosuav at gmail.com
Fri Nov 21 03:33:15 CET 2014

On Fri, Nov 21, 2014 at 10:34 AM, Chris Angelico <rosuav at gmail.com> wrote:

On Fri, Nov 21, 2014 at 6:36 AM, Guido van Rossum <guido at python.org> wrote:

It would also be useful if we could extend the PEP with some examples of the various categories of fixes that can be applied easily, e.g. a few examples of "raise StopIteration" directly in a generator that can be replaced with "return" (or omitted, if it's at the end); a few examples of situations where "yield from" can supply an elegant fix (and an alternative for code that needs to be backward compatible with Python 3.2 or 2.7); and finally (to be honest) an example of code that will require being made more complicated.

Oh, and it would also be nice if the PEP included some suggested words that 3rd party educators can use to explain the relationship between StopIteration and generators in a healthier way (preferably a way that also applies to older versions). Chris, are you up to drafting these additions? Sure, no problem. Will knock something up shortly.

Examples and explanatory text added.

https://raw.githubusercontent.com/Rosuav/GenStopIter/master/pep-0479.txt

ChrisA

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