On Thursday, June 23, 2016 at 9:57:35 PM UTC+12, Marko Rauhamaa wrote: > Lawrence D’Oliveiro: > >> On Thursday, June 23, 2016 at 9:11:05 PM UTC+12, Marko Rauhamaa wrote: >>> The __len__ method is not guaranteed to execute in O(1). >> >> So what is? > > The __bool__ method is the appropriate place to implement an efficient > emptiness check. It might not be O(1) but it will be the most efficient > way to check for emptiness, or the class is badly implemented.
Saying “or the class is badly implemented” sounds like circular reasoning... -- https://mail.python.org/mailman/listinfo/python-list
