-1 strongly.
This will hide crucial type errors.
One could argue that aDict.keys() could behave as a set though.
> On 17 Sep 2019, at 17:03, Rupert Spann <rupert.sp...@ska.ac.za> wrote:
>
>
> related to: pep-0584, PEP-0218, and ???
>
> The request is that since dictionary keys can not be duplicated / are unique
> that they may behave the same as sets - and have the set operators actions
> and return sets.
> eg.:
>
> aSet = set('a','b','c','bar')
> aDict = {'a':'aaa', 'b':'baa' , 'foo':fou' }
> bDict = {'a':'ea', 'b':'bee' , 'foo':fuh', 'bar': 'drink' }
>
> aSet | aDict | bDict
> = set('a','b','c','foo','bar')
>
> bDict & aDict
> =set('a','b','foo')
>
> bDict - aSet
> =set('foo')
>
> aDict^bDict
> =set('bar')
>
> The dictionary class would support set filtering:
> New_dict_from_set = { your_key: old_dict[your_key] for your_key in aSET }
> e.g. a function such as: (taking the intersection)
> aDict.Subdictionary(aSet)
> ={'a':'aaa', 'b':'baa'}
>
> set(dictionary) would return the Keys (as a mutable).
>
> Adding an element to the mutable set would add a None as a value to the
> dictionary.
>
>
>
> The "-=", "-", "+", "+=" would behave as specified in pep-0584 if both are
> dictionaries, but if one of the operands is a set - a set is returned.
>
> The behaviour of
> bDict.Subdictionary(aDict)
> = {'a':'ea', 'b':'bee' , 'foo':fuh')
> i.e. treats aDict as a set
>
> aDict.Subdictionary(List)== aDict.Subdictionary(Set(List))
>
>
> _______________________________________________
> Python-ideas mailing list -- python-ideas@python.org
> To unsubscribe send an email to python-ideas-le...@python.org
> https://mail.python.org/mailman3/lists/python-ideas.python.org/
> Message archived at
> https://mail.python.org/archives/list/python-ideas@python.org/message/YY3KZZGEX6VEFX5QZJ33P7NTTXGPZQ7N/
> Code of Conduct: http://python.org/psf/codeofconduct/
_______________________________________________
Python-ideas mailing list -- python-ideas@python.org
To unsubscribe send an email to python-ideas-le...@python.org
https://mail.python.org/mailman3/lists/python-ideas.python.org/
Message archived at
https://mail.python.org/archives/list/python-ideas@python.org/message/TYD342GRECL3PZ5LL6PEMOQTLOZXOIVQ/
Code of Conduct: http://python.org/psf/codeofconduct/
