New submission from Anthony Foglia <afog...@gmail.com>: I was debugging a class where I defined __getitem__ and __iter__, but not __contains__. The documentation describing this case (at the end of section 5.9) is old and hasn't been updated for the iterator protocol.
It should read something like: "For user-defined classes which do not define __contains__() and do define __iter__() or __getitem__(), x in y is true if and only if there is a value z reachable from iter(y) before iter(y) throws a StopIteration exception. (If any other exception is raised, it is as if in raised that exception)." Or something better worded. (I'm using Python 2.5, but I really doubt things have changes in 2.6 or 2.7. I don't know enough about 3.0 to know either way.) ---------- assignee: georg.brandl components: Documentation messages: 89607 nosy: afoglia, georg.brandl severity: normal status: open title: "in" expression falls back to __iter__ before __getitem__ versions: Python 2.5, Python 2.6, Python 2.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue6324> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
