There's a long thread about the subject: https://mail.python.org/pipermail/python-ideas/2015-February/031748.html
I suggest to avoid the matter altogether :) On Thu, Apr 12, 2018 at 4:15 PM, Mike Miller <python-id...@mgmiller.net> wrote: > While we're on the subject, I've tried to add dicts a few times over the > years to get a new one but it doesn't work: > > d3 = d1 + d2 # TypeError > > Thinking a bit, set union is probably a better analogue, but it doesn't > work either: > > d3 = d1 | d2 # TypeError > > Where the last value of any duplicate keys should win. > > -Mike > > > > On 2018-04-12 06:46, Andrés Delfino wrote: > >> Extending the original idea, IMHO it would make sense for the dict >> constructor to create a new dictionary not only from several mappings, but >> mixing mappings and iterables too. >> >> Consider this example: >> >> x = [(1, 'one')] >> y = {2: 'two'} >> >> Now: {**dict(x), **y} >> Proposed: dict(x, y) >> > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ >
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