On Wed, Nov 10, 2021 at 5:45 PM Steven D'Aprano <st...@pearwood.info> wrote: > > On Wed, Nov 10, 2021 at 05:11:33PM +1100, Chris Angelico wrote: > > > Nothing's technically new. You could make an inefficient sorted dict like > > this: > > > > class SortedDict(dict): > > def __iter__(self): return iter(sorted(self.keys())) > > You would need more than that. You would want to ensure that the dict's > repr shows it is sorted order. You would need popitem to pop items in > the appropriate order. There may be other APIs that sorted dicts provide > than merely sorting the keys on iteration.
Sure. That was a massively oversimplified one, to point out that the question of whether this is "truly new" is fairly meaningless. A thing can be extremely useful without actually being *new* per se. > You don't actually need to implement this to see how repeatedly sorting > the keys would give terrible performance for anything above small sets > of data. And yes. That is exactly the problem. > > IMO this is a great tool to have on PyPI. Someone can start the naive > > way, run into major performance problems, and then go "huh, maybe > > someone else has already solved this problem". Doesn't need to be in > > the stdlib for that. > > You may have missed that this thread has already discussed two mature, > good quality sorted dict implementations that have been on PyPI for > years: > > https://pypi.org/project/sortedcontainers/ > > https://pypi.org/project/treap-python/ > > > Here are a few more: > > https://pypi.org/project/ruamel.ordereddict/ > > https://github.com/surenkov/PySortedDict > > https://pypi.org/project/sorteddict/ > I know it's on PyPI, in multiple forms. I'm saying that it's a great tool to keep there, not in the stdlib. ChrisA _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/QKFJJBYDAGHVFWSLSUSYS4WY7ECJ3ONQ/ Code of Conduct: http://python.org/psf/codeofconduct/
