Lawrence D’Oliveiro writes: > 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...
What are you thinking? If there's a better way to implement __bool__, why shouldn't that better way have been used? -- https://mail.python.org/mailman/listinfo/python-list
