New submission from Yan Mitrofanov <mmxlv...@mail.ru>:
Sorting documentation claims that sorting algorithm is only using < comparisons https://docs.python.org/3/howto/sorting.html#odd-and-ends https://docs.python.org/3/library/stdtypes.html#list.sort When __lt__ implementation is missing, you get an exception class Foo: pass sorted([Foo(), Foo(), Foo()]) TypeError: '<' not supported between instances of 'Foo' and 'Foo' However, if implement __gt__ method, you doesn't get an exception class Foo: def __gt__(self, other): return False sorted([Foo(), Foo(), Foo()]) # ok Is it supposed to work like this? Or is it lack of documentation? ---------- assignee: docs@python components: Documentation messages: 359293 nosy: docs@python, yanmitrofanov priority: normal severity: normal status: open title: Sorting falls back to use __gt__ when __lt__ is not present versions: Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue39210> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
