I’d like to try my hand at implementing this, if nobody else is interested. I should be able to have something up today.
Brandt > On Feb 27, 2019, at 11:05, João Matos <[email protected]> wrote: > > Hello, > > Great. > Because I don't program in any other language except Python, I can't make the > PR (with the C code). > Maybe someone who program in C can help? > > Best regards, > > João Matos >> On 27-02-2019 18:48, Guido van Rossum wrote: >> >>> On Wed, Feb 27, 2019 at 10:42 AM Michael Selik <[email protected]> wrote: >>> >>> >>>> On Wed, Feb 27, 2019 at 10:22 AM Anders Hovmöller <[email protected]> >>>> wrote: >>>> I dislike the asymmetry with sets: >>>> >>>> > {1} | {2} >>>> {1, 2} >>>> >>>> To me it makes sense that if + works for dict then it should for set too. >>>> >>>> / Anders >>>> >>>> > On 27 Feb 2019, at 17:25, João Matos <[email protected]> wrote: >>>> > >>>> > Hello, >>>> > >>>> > I would like to propose that instead of using this (applies to Py3.5 and >>>> > upwards) >>>> > dict_a = {**dict_a, **dict_b} >>>> > >>>> > we could use >>>> > dict_a = dict_a + dict_b >>> >>> >>> The dict subclass collections.Counter overrides the update method for >>> adding values instead of overwriting values. >>> >>> https://docs.python.org/3/library/collections.html#collections.Counter.update >>> >>> Counter also uses +/__add__ for a similar behavior. >>> >>> >>> c = Counter(a=3, b=1) >>> >>> d = Counter(a=1, b=2) >>> >>> c + d # add two counters together: c[x] + d[x] >>> Counter({'a': 4, 'b': 3}) >>> >>> At first I worried that changing base dict would cause confusion for the >>> subclass, but Counter seems to share the idea that update and + are >>> synonyms. >> >> Great, this sounds like a good argument for + over |. The other argument is >> that | for sets *is* symmetrical, while + is used for other collections >> where it's not symmetrical. So it sounds like + is a winner here. >> >> -- >> --Guido van Rossum (python.org/~guido) >> >> >> _______________________________________________ >> Python-ideas mailing list >> [email protected] >> https://mail.python.org/mailman/listinfo/python-ideas >> Code of Conduct: http://python.org/psf/codeofconduct/ > > _______________________________________________ > Python-ideas mailing list > [email protected] > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/
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