unicode as valid naming symbols

Rustom Mody rustompmody at gmail.com
Thu Mar 27 16:51:39 CET 2014


On Thursday, March 27, 2014 8:58:51 PM UTC+5:30, Mark H. Harris wrote:
> On 3/25/14 6:58 PM, Steven D'Aprano wrote:

> > To quote a great Spaniard:
> >      “You keep using that word, I do not think it means what you
> >       think it means.”

>     In~con~theveable !      My name is Inigo Montoya, you killed my 
> father, prepare to die...

> > Do you think that the ability to write this would be an improvement?
> > import ⌺
> > ⌚ = ⌺.╩░
> > ⑥ = 5*⌺.⋨⋩
> > ❹ = ⑥ - 1
> > ♅⚕⚛ = [⌺.✱✳**⌺.❇*❹{⠪|⌚.∣} for ⠪ in ⌺.⣚]
> > ⌺.˘˜¨´՛՜(♅⚕⚛)

>     Steven, you're killing me here; argument by analogy does not work!

>     √ = lambda n: sqrt(n)      <===== but this should work...

>     In point of fact, it should be built-in !   OK, IMHO.

> > Of course, it's not even necessary to be that exotic. "Any unicode symbol
> > that is not a number"... that means things like these:

>    No, any unicode character (except numerals) should be able to begin a 
> name identifier.   alt-l  λ   and  alt-v  √   should be valid first 
> character name identifier symbols.

> > There are languages that can allow arbitrary symbols as identifiers, like
> > Lisp and Forth. You will note that they have a certain reputation for
> > being, um, different, and although both went through periods of
> > considerable popularity, both have faded in popularity since.

>     Actually, there is a recent resurgence of popularity in both common 
> lisp and scheme these days.  But, again, that has nothing to do with my 
> argument.  No modern language should limit the use of certain symbols to 
> say, only math  √ .    The radical symbol is more often than not going 
> to be useful only with math (which , by the way is why it should be 
> built-in as  √ = squre-rooot) but why limit its use elsewhere.

>     Whether this can work in python is also beside the point, because 
> I'm not demanding anything here either, at this point.

> have a good day!

The problem is that mathematicians invent notations in a completely
laissez-faire manner.

Language implementers having to unrestrainedly keep up would go mad.
And then us vanilla users (aka programmers) would have to deal with maddened
implementers.

Observe:
Good ol infix -- x+y..
prefix (with paren) -- foo(x)
prefix without  -- ¬ x
In case you thought alphanumerics had parens --  sin x
Then theres postfix   -- n!
Inside fix   -- nCr (Or if you prefer ⁿCᵣ ??)
And outside fix -- mod -- |x|

And Ive probably forgotten 2 dozen other common ones



More information about the Python-list mailing list