On Fri, Mar 15, 2019 at 11:42 AM Steven D'Aprano <steve@pearwood.info> wrote:

I still remember being told in no uncertain terms by the core devs that
adding a clear() method to lists was a waste of time because there was
already a perfectly good way to spell it with slicing. And then ABCs
came along and now lists have a clear method. So opinions change too.

I agree with the opinions expressed in the (partially) quoted message 
but I don't think that this is how this particular change happened.

;-) ;-)

André Roberge