[Python-ideas] Dart-like method cascading operator in Python

[Steven D'Aprano]

On Fri, Nov 22, 2013 at 10:32:13AM +0100, Perešíni Peter wrote:

> Actually, thinking about my own ideas -- the bigger problem than yield is
> the return. I am not sure if things like
> 
> return list(range(10))
>     ..reverse()
>     ..pop(0)
> 
> should be allowed or not - having something being executed after the return
> statement line might be a bit confusing

If Python gains this syntax, I don't see why that shouldn't be allowed. 
That some of the lines of code occur physically after the return keyword 
is no more a problem than here:

    return (spam()
            + eggs() + toast() 
            + milk() + cookies()
            )
            
In your case, the suite

    list(range(10))
         ..reverse()
         ..pop(0)

is evaluated first, and then returned.



-- 
Steven