[Python-Dev] accumulator display syntax
python at rcn.com
Fri Oct 17 17:55:11 EDT 2003
> > Which is why I didn't like the 'sum[x for x in S]' notation much.
> Let it rest in peace, then.
Goodbye, weird __getitem__ hack!
> > Let's look for an in-line generator notation instead. I like
> > sum((yield x for x in S))
> So do I, _with_ the mandatory extra parentheses and all, and in
> fact I think it might be even clearer with the extra colon that Phil
> had mentioned, i.e.
> sum((yield: x for x in S))
[David Eppstein, in a separate note]
> Along with that confusion, (x*x for x in S) would look like a tuple
> comprehension, rather than a bare iterator.
Phil's idea cleans that up pretty well:
(yield: x*x for x in S)
This is no more tuple-like than any expression surrounded by parens.
More information about the Python-Dev