[Python-ideas] [Python-Dev] hello, new dict addition for new eve ?

Guido van Rossum guido at python.org
Sat Dec 31 16:52:09 CET 2011

On Sat, Dec 31, 2011 at 2:16 AM, julien tayon <julien at tayon.net> wrote:

> Dear All :)
> 2011/12/30 Eric Snow <ericsnowcurrently at gmail.com>:
> > On Fri, Dec 30, 2011 at 10:02 AM, Guido van Rossum <guido at python.org>
> wrote:
> >> What I meant is similar to set union on the keys, where if a key exists
> in
> >> both dicts, the value in the result is equal to one of the values in the
> >> operands (and if the value is the same for both operands, that value is
> also
> >> the result value).
> >
> > +1
> >
> > This is the one I was thinking of too.
> >
> Well, since I have coded way too much in Perl, my altered sense of
> reality has come to a concept I may be introducing too early which is
> : algebrae.
> strings, lists, ... have a record algebrae.
> ndarray, accudict have a linear algebrae
> sets ... have sets algebrae.
> And much more algebrae exists wich all exists not only in my
> imagination, but also in math (wich I quite dislike). (Abelian
> stuff/Group/matrix/hilbert)
> All of these algebrae are consistent as long as any object in the
> chain of algebrae are following the same rules.
> And each of these are very legitimate (even though of course my dict
> addition is the best without trying to be obnoxious).
> I was kind of thinking of
> 1) giving a property to object called .. __algebrae__,
> 2) and through some magic being able to change the algebrae of an
> object on the fly.
> My twisted sense of reality inherited from Perl (but a little less
> than my math books) tells me There Is More Than One Way To
> Consistently Add/Mul/Div/Sub It.
> As a Proof of Concept I could deliver a monkeypatching of list() that
> makes it behave like an numpy array.

Please don't present this in terms of modifications of existing
functions/types/methods. Please use subclasses, new modules, new functions,

> But, at first I wish to concentrate on dict addition, since I can only
> steal a few hours connectivity per day ... So I will try to answer to
> everyone since I saw some spoilers of what I had hidden in my mind  :)
> Cheers
> Thanks

--Guido van Rossum (python.org/~guido)
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