[Python-ideas] Dollar operator suggestion

[Stephan Houben]

Why not a functional syntax, i.e.

compose(f, g, h)

rather than f $ g $ h

Advantage: you can do it today.
Without need to convince Guido to add more line noise to the language.

https://gist.github.com/stephanh42/6c9158c2470832a675fad7658048be9d

Stephan


2017-10-26 13:06 GMT+02:00 Yan Pas <yanp.bugz at gmail.com>:

> I've looked up this feature in haskell. Dollar sign operator is used to
> avoid parentheses.
>
> Rationalle:
> Python tends to use functions instead of methods ( e.g. len([1,2,3])
> instead of [1,2,3].len() ). Sometimes the expression inside parentheses
> may become big  and using a lot of parentheses may tend to bad readability.
> I suggest the following syntax:
>
> len $ [1,2,3]
>
> Functions map be also  chained:
>
> len $ list $ map(...)
>
> This operator may be used for function composition too:
>
> foo = len $ set $
> in the same as
> foo = lambda *as,**kas : len(set(*as, **kas))
> in current syntax
>
> Regards,
> Yan
>
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