And yet: This is trivial to implement in a custom metaclass - and maybe it would make default type too "noisy".
I am -1 on this going into normal classes, and +0 for having a colaborative metaclass with __lt__, __eq__ and such implementing these on the stdlib. Maybe living in "types". On Fri, 14 Jun 2019 at 14:53, Brett Cannon <br...@python.org> wrote: > I think the logic breaks down with multiple inheritance. If you make C(A, > B), then you can say C > A and C > B, but then you can't say A > B or A < B > which breaks sorting. > > If you want to know if a B inherits from Base, then I think `Base in > B.mro()` will cover that just as succinctly. And if you need to know > position you can compare indexes into the MRO. > > On Fri, Jun 14, 2019 at 1:06 AM eminbugrasaral--- via Python-ideas < > python-ideas@python.org> wrote: > >> Let's assume you have this model: >> >> ``` >> class Base: >> pass >> >> class A(Base): >> pass >> >> class B(Base): >> pass >> >> class C(A): >> pass >> ``` >> >> While we can do `A == B`, or `B == C` or `B == B`, I would expect to be >> able to compare like this as well: `A >= B (if B is subclass or itself of >> A)`, or `B <= C (if B is a subclass or itself of C)` >> >> Because, since == means equality check. With the same logic, a class >> wraps another class is actually greater than this class from its type. >> _______________________________________________ >> 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/6W7HCI4UIEAUD6AVLFSJF5Q2X55LWYZA/ >> Code of Conduct: http://python.org/psf/codeofconduct/ >> > _______________________________________________ > 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/IFW2UQNCCNYFZH3TFKD26WH7SKCP4YKT/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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