Re: [Python-ideas] dict.merge(d1, d2, ...) (Counter proposal for PEP 584)

On 2019-03-21 17:11, Guido van Rossum wrote:

I don't find it easy to understand or remember that d1.update(d2) modifies d1 in place, while d1.merge(d2) first copies d1.

That would be an advantage with + versus += (or | versus |=).