[docs] [issue29986] Documentation recommends raising TypeError from tp_richcompare

[Devin Jeanpierre]

Devin Jeanpierre added the comment:

Sorry, forgot to link to docs because I was copy-pasting from the PR:

https://docs.python.org/2/c-api/typeobj.html#c.PyTypeObject.tp_richcompare

https://docs.python.org/3/c-api/typeobj.html#c.PyTypeObject.tp_richcompare

> Note: If you want to implement a type for which only a limited set of comparisons makes sense (e.g. == and !=, but not < and friends), directly raise TypeError in the rich comparison function.

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