On 30/11/2017 22:26, Greg Ewing wrote: > Steven D'Aprano wrote: >> On Wed, Nov 29, 2017 at 07:33:54PM +0000, Steve Barnes wrote: >> >>> Just a thought but what about a syntax something along the lines of: >>> >>> a, b, *remainder = iterable >>> >>> Where remainder becomes the iterable with the first two values >>> consumed by assigning to a & b. >> >> Guido's time machine strikes again. That has worked since 3.3 if not >> older. > > This is not quite the same thing -- the rest of the items > are extracted and put in a new list. I think Steve Barnes is > suggesting that the iterator should be left alone and > bound to the * target instead. > > That would be an incompatible change. > That is what I was thinking of but surely it would be more efficient way to do this for generators and large iterators. Since the practical difference between remainder being the (partly exhausted) iterator and it being a list, (itself an iterator), containing the results of expanding the remainder of the original iterator is slight.
The only limitation would be that the syntax a, b, *remainder, c, d = iterator would be illegal. -- Steve (Gadget) Barnes Any opinions in this message are my personal opinions and do not reflect those of my employer. --- This email has been checked for viruses by AVG. http://www.avg.com _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
