On Mon, 30 Nov 2020 at 23:26, David Mertz <me...@gnosis.cx> wrote: > Somehow "dire" doesn't strike me as the right word.... Maybe you were looking > for "conceivably useful in niche cases."?
Well, I think const can be useful for: * multiprocessing. Now, for example, dict is passed between processes using MappingProxyType, which is slow. * avoid side effects. I expect that my object will not change and I want to be sure I'll not change it by mistake. Mistake that I made a lot of times. * contract. A function marks a parameter as const will guarantee that the object will not be changed. It's something complementar to annotations. * possible future speed improvements. For example, if an iterable is const, you can skip a lot of checks about mutability on iteration and make it more fast. _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/GVYJJCPRBYTTXFJ7GYTUMSDVYUWJZUJU/ Code of Conduct: http://python.org/psf/codeofconduct/
