[Python-Dev] PEP 572: Assignment Expressions (original) (raw)

Sven R. Kunze srkunze at mail.de
Mon Apr 23 16:35:39 EDT 2018

On 23.04.2018 19:31, Tim Peters wrote:

Surely you're joking. This is math.gcd(), which is expensive for multi-thousand bit integers, and the interpreter knows nothing about it. Adding a cache of any kind (LRU or otherwise) would make it even slower. Alright, if that problem is just about performance, then there must be a better way to resolve it rather than inventing a new syntax. Btw. storing the result in a local var is also a cache IMHO. And if gcd is immutable, I think Python can do a great job here of optimizing.

Anyway, your example is the best one I've seen so far.

More information about the Python-Dev mailing list