[Terry Reedy <tjre...@udel.edu>] ]& skipping all the parts I agree with]
> ... > Covered by "For user-defined classes which do not define __contains__() > but do define __iter__(), x in y is True if some value z, for which the > expression x is z or x == z is true, is produced while iterating over y. > " in > > https://docs.python.org/3/reference/expressions.html#membership-test-operations Just went through that with Serhiy. Very briefly, two problems: 1. Those docs are over-specified if we intend that the "x is z" is an implementation choice rather than a language requirement. 2. Repeating all that stuff all over the docs is a PITA, error-prone, and ugly, since contexts that call PyObject_RichCompareBool() under the covers are all over the place too. Document it carefully in _one_ place (the Reference Manual already has your good start), and just plant links to that in high-value locations elsewhere in the docs. _______________________________________________ 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/4EVEQZZPEPAGSJ25SSG2EQWQ3MUP2ZHW/ Code of Conduct: http://python.org/psf/codeofconduct/
