There is a conter proposal to use classmethod like this from another core develo... | Hacker News

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		Znafon on March 6, 2019 \| parent \| context \| favorite \| on: PEP 584 – Add + and – operators to the built-in di... There is a conter proposal to use classmethod like this from another core developer.

rurban on March 6, 2019 [–]

with an object method you could return the changed dict (ref semantics, much faster) and as class methodcall you would return a copy, as with +.

d.merge(d1) vs dict.merge(d, d1)

So have the best of both worlds, and backwards compatible.

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