Omer Katz added the comment: The default implementation should simple: Once the property is accessed for the first time calculate the result and never calculate again. It's what both Django & pip uses. You can add an optional TTL. There aren't any other features I can come up with that are common enough. If needed, one can inherit from cached_property and do whatever is needed. Eric, Why don't you think a C implementation is needed? It's a simple operation for sure but it is meant to increase runtime efficiency.
2014-04-05 1:11 GMT+04:00 Éric Araujo <rep...@bugs.python.org>: > > Éric Araujo added the comment: > > It could make sense to add clean, working recipes to e.g. the functools > documentation. The cached_property in the wiki uses a TTL, other like > Pyramid's reify decorator make properties that ensure the fget function is > called only once per instance, and there may be subtly different variants > out there. I don't know if there's a universally useful variant that > should be added to the sdlib right now. (I don't think a C implementation > is needed.) > > On a related note, the Python docs about desciptors may be missing > entry-level explanations, as described here: > http://me.veekun.com/blog/2012/05/23/python-faq-descriptors/ > > ---------- > nosy: +eric.araujo, rhettinger > > _______________________________________ > Python tracker <rep...@bugs.python.org> > <http://bugs.python.org/issue21145> > _______________________________________ > ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue21145> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
