On Sat, Feb 18, 2017 at 2:12 AM, Joseph Hackman <josephhack...@gmail.com> wrote: > As for what triggers execution? I think everything except being on the right > side of an assignment. Even identity. So if a delayed expression would > evaluate to None, then code that checks is None should return true. I think > this is important to ensure that no code needs to be changed to support this > feature. > > So for Chris: yes, rand is otherrand not because the delayed instances are > the same, but because the value under them is the same, and the is should > trigger evaluation. Otherwise code would need to be delayed aware. >
Interesting. Okay. So in effect, these things aren't objects, they're magic constructs that turn into objects the moment you do anything with them, even an identity check. That makes sense. Can you put deferred objects into collections, or will they instantly collapse into concrete ones? ChrisA _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
