On Sun, Oct 20, 2019 at 03:06:16PM -0700, Guido van Rossum wrote:
> So the choice is really only three way.
>
> 1) Add d1 + d2 and d1 += d2 (using similarity with list + and +=)
> 2) Add d1 | d2 and d1 |= d2 (similar to set | and |=)
> 3) Do nothing
Are you saying a method is a non-starter?
A method won't satisfy those who prefer an operator, but it otherwise
has a number of advantages, and few (that I can see) disadvantages.
It would be like the Judgment of Solomon though. A method is not enough to change the dict API -- I'd rank it below "do nothing".
I think your analysis here:
> IMO the reason this is such a tough choice is that Python learners are
> typically introduced to list and dict early on, while sets are introduced
> later.
[...]
> So if we want to cater to what most beginners will know, + and += would be
> the best choice. But if we want to be more future-proof and consistent, |
> and |= are best -- after all dicts are closer to sets (both are hash
> tables) than to lists. (I know you can argue that dicts are closer to lists
> because both support __getitem__ -- but I find that similarity shallower
> than the hash table nature.)
is excellent, and I think I shall steal it for the PEP :-)
You're welcome.