On Wed, Apr 11, 2018 at 1:41 PM, Steven D'Aprano <st...@pearwood.info> wrote: > Personally, I still think the best approach here is a combination of > itertools.accumulate, and the proposed name-binding as an expression > feature: > > total = 0 > running_totals = [(total := total + x) for x in values] > # alternative syntax > running_totals = [(total + x as total) for x in values] > > If you don't like the dependency on an external variable (or if that > turns out not to be practical) then we could have: > > running_totals = [(total := total + x) for total in [0] for x in values] >
Linking this to the PEP 572 thread, this is an open question now: https://www.python.org/dev/peps/pep-0572/#importing-names-into-comprehensions Anyone who's interested in (or intrigued by) this potential syntax is very much welcome to hop over to the PEP 572 threads and join in. ChrisA _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
