On 31 August 2013 01:13, Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> wrote: > On Fri, 30 Aug 2013 06:35:47 -0400, Roy Smith wrote: > >> In article <52200699$0$6599$c3e8da3$54964...@news.astraweb.com>, >> Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> wrote: >> >>> These days, it would be relatively simple to implement pre- and post- >>> condition checking using decorators, and indeed one of the motivating >>> use- cases for function annotations in Python 3 is to allow such >>> things. >>> >>> http://www.python.org/dev/peps/pep-3107/ >>> >>> (Function annotations are perhaps the best Python feature that nobody >>> uses.) >> >> This is awesome. > > Heh, everybody has one of two reactions: > > "This is awesome!" > > "You'll add type checking to my Python code over my dead body!!!" > > But I'm still to see a practical use for annotations in real world code. > Or indeed to think of a use for them other than type checking.
I occasionally use them for documentation. I think that there some are cases where the return type (encoded as a string) is as good an indicator of functionality as a short docstring, so use both. -- http://mail.python.org/mailman/listinfo/python-list