[Python-Dev] list comprehensions again...

[esr@thyrsus.com]

Barry A. Warsaw <bwarsaw@beopen.com>:
> Range literals I can see as being worth it.  I wonder if parallel for
> loops can't be handled more gracefully with a function -- isn't it
> just a nice wrapper around a specific call to map() anyway?
> 
> List comprehensions do seem to need more syntactic support, but the
> ambiguity of the semantics bothers me.

I agree with both evaluations, and have just posted a proposal to 
replace parallel for-loops with a new data constructor.

(I still like list comprehensions.  But they need to be cleaner.)
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