Operator Precedence/Boolean Logic

[Lawrence D’Oliveiro]

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...