On Wednesday, September 14, 2016 at 5:00:02 PM UTC-4, Lawrence D’Oliveiro wrote: > On Thursday, September 15, 2016 at 8:13:05 AM UTC+12, Terry Reedy wrote: > > Because True is the default, object need not and at least in CPython > > does not have a __bool__ (or __len__) method. > > If they had to (in the absence of which a bool() cast would not work), then > that would help prevent problems like the one I previously linked to, don’t > you think?
Requiring an explicit conversion method wouldn't help the "midnight is False" problem: it was *caused* by an explicit conversion method. From the article: > A Python bug was opened in 2012 about midnight as False, but it was closed > soon thereafter as "invalid". The time class was documented to work that way > and someone had created a __nonzero__() (now __bool__()) method for time to > implement that behavior. --Ned. -- https://mail.python.org/mailman/listinfo/python-list
