Replying to the question in subject, I think it would be better in collections as a class.Having it just as a function doesn't buy much, because one can do the same with three lines and a defaultdict.
_______________________________________________However, if this is a class it can support adding new elements, merge the groupeddicts, etc.--Ivan
Python-ideas mailing list
Python-ideas@python.org
https://mail.python.org/mailman/listinfo/python-ideas
Code of Conduct: http://python.org/psf/codeofconduct/