On 20 May 2013 00:57, "Guido van Rossum" <gvanros...@gmail.com> wrote: > > Hm. Wouldn'tvevery call site be slowed down by checking for that flag?
Yeah, I forgot about having to push everything through the tp_call slot, so we can't easily limit the ordering check to just those cases where the callable accepts arbitrary kwargs. Cheers, Nick. > — > Sent from Mailbox > > > On Sun, May 19, 2013 at 7:42 AM, Nick Coghlan <ncogh...@gmail.com> wrote: >> >> On Sun, May 19, 2013 at 11:01 PM, Antoine Pitrou <solip...@pitrou.net> wrote: >> > The main use case seems to be the OrderedDict constructor itself. >> > Otherwise, I can't think of any situation where I would've wanted it. >> >> I've had a couple related to populating other mappings where order >> matters, at least from a predictability and readability perspective, >> even if it's not strictly required from a standards compliance point >> of view (think writing XML attributes, etc). >> >> I quite liked the idea of a simple flag attribute on function objects >> that the interpreter checked, with a decorator in functools (or even >> the builtins) to set it. It's not a particularly elegant solution, but >> it would get the job done with minimal performance impact on existing >> functions. >> >> Cheers, >> Nick. >> >> -- >> Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia >> _______________________________________________ >> Python-Dev mailing list >> Python-Dev@python.org >> http://mail.python.org/mailman/listinfo/python-dev >> Unsubscribe: http://mail.python.org/mailman/options/python-dev/guido%40python.org > >
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