[Python-ideas] Make partial a built-in

[אלעזר]

foo.__call__.partial() solves most of the problem I think.

בתאריך יום ג׳, 20 בספט' 2016, 12:43, מאת Michel Desmoulin ‏<
desmoulinmichel at gmail.com>:

> (Sorry, answered to one person again. Reposting)
>
> I like the bind() idea because it doesn't clutter the builtin namespace.
> It solves the import problem and feels very natural IMO.
>
> The only issue is the name. In my mind, bind() convey the idea you are
> modifying the function it self, while partial() convey the idea you
> return new function.
>
> It could also be written in C for performances.
>
>
> Le 20/09/2016 à 10:22, אלעזר a écrit :
> > Yeah I did say it was a strawman :)
> >
> > On Tue, Sep 20, 2016 at 11:17 AM Chris Angelico <rosuav at gmail.com
> > <mailto:rosuav at gmail.com>> wrote:
> >
> >     On Tue, Sep 20, 2016 at 6:09 PM, אלעזר <elazarg at gmail.com
> >     <mailto:elazarg at gmail.com>> wrote:
> >     > I meant something like making it a "__bind__" (just a strawman
> >     suggestion)
> >     > and do the same lookup as foo() does, and using a (wrong)
> >     > functional-programming-inspired syntax
> >     >
> >     >     foo 5 ()
> >     >
> >     > Such a syntax will have the side benefit of allowing calling print
> >     in a
> >     > similar way to Python2, which people seem to love.
> >     >
> >     >     print "hello" ()
> >     >
> >
> >     Python has a rule that syntax shouldn't look like grit on Tim's
> >     screen. In this case, it looks like the *absence of* grit, which is
> >     even worse :) You're giving meaning to the abuttal of two tokens, the
> >     first of which must be callable but the second can be anything. And
> it
> >     creates the scary situation of giving valid-but-useless meaning to
> >     something all too common in Py2 code:
> >
> >     print "hello"
> >
> >     This would now create a function that, if called, would print
> "hello",
> >     but then abandons it without a second thought. So it'd work in 2.7,
> >     fail with an opaque error in 3.3, fail with a more informative error
> >     in 3.5, and silently do nothing in 3.7. No thank you! :)
> >
> >     ChrisA
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