R. David Murray added the comment: This is as designed. The only method needed for something to qualify as an Iterable is __iter__, thus this is the only method defined on the ABC. If you want your Iterable to be usable in a boolean test, add the __bool__ method to your concrete class.
In fact, you will note that no ABCs define __bool__. Likewise __len__ is not part of being an Iterator, and in fact in the general case Iterators do not have a len (a given Iterator might be infinite, or it might not be practical to calculate the len). ---------- nosy: +r.david.murray resolution: -> rejected stage: -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue25513> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
