Guido's new method definition idea

Russ P. Russ.Paielli at gmail.com
Sat Dec 6 02:41:11 EST 2008


On Dec 5, 6:21 pm, "Daniel Fetchinson" <fetchin... at googlemail.com>
wrote:
> Hi folks,
>
> The story of the explicit self in method definitions has been
> discussed to death and we all know it will stay. However, Guido
> himself acknowledged that an alternative syntax makes perfect sense
> and having both (old and new) in a future version of python is a
> possibility since it maintains backward compatibility. The alternative
> syntax will be syntactic sugar for the old one. This blog post of his
> is what I'm talking about:
>
> http://neopythonic.blogspot.com/2008/10/why-explicit-self-has-to-stay...
>
> The proposal is to allow this:
>
> class C:
>     def self.method( arg ):
>         self.value = arg
>         return self.value
>
> instead of this:
>
> class C:
>     def method( self, arg ):
>         self.value = arg
>         return self.value
>
> I.e. explicit self stays only the syntax is slightly different and may
> seem attractive to some. As pointed out by Guido classmethods would
> work similarly:
>
> class C:
>     @classmethod
>     def cls.method( arg ):
>         cls.val = arg
>         return cls.val
>
> The fact that Guido says,
>
> "Now, I'm not saying that I like this better than the status quo. But
> I like it a lot better than [...] but it has the great advantage that
> it is backward compatible, and can be evolved into a PEP with a
> reference implementation without too much effort."
>
> shows that the proposal is viable.
>
> I'd like this new way of defining methods, what do you guys think?
> Anyone ready for writing a PEP?
>
> Cheers,
> Daniel
>
> --
> Psss, psss, put it down! -http://www.cafepress.com/putitdown

I like it.

I'll even go a step further and suggest that "$" be allowed as a
substitute for "self". It looks like a capital "S" (for Self), and it
stands out clearly. It also makes code more succinct with no loss of
readability. Think of the line wraps that could be avoided.



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