Why does `object` define rich comparison dunders `__lt__` etc? As far as I can tell, `object.__lt__` etc always return NotImplemented. Merely inheriting from object isn't enough to have comparisons work. So why do they exist at all? Other "do nothing" dunders such as `__add__` aren't defined.
I've tried searching for answers, and looked at the source code for rich comparisons here: https://github.com/python/cpython/blob/3.8/Objects/object.c read the information here and in the PEP: https://docs.python.org/3/c-api/object.html#c.PyObject_RichCompare https://www.python.org/dev/peps/pep-0207/ I'm not sure if I'm looking in the right places, or if I even understand exactly what I'm looking at, but I think the relevent code is in typeobject.c, which defines a type: PyTypeObject PyBaseObject_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "object", /* tp_name */ ... and then sets tp_richcompare to `object_richcompare`. I guess that is enough to define the dunder methods? Since (as far as I can tell) they don't do anything, why do they exist? Thanks in advance. -- Steve _______________________________________________ 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/TWL5VMCXC6SUEGRQ36CAMPA273E4O2TZ/ Code of Conduct: http://python.org/psf/codeofconduct/
