[Python-Dev] zip() and list-comprehension with commas

[Moshe Zadka]

On Tue, 11 Jul 2000, Ka-Ping Yee wrote:

> On Tue, 11 Jul 2000, Paul Prescod wrote:
> > 
> > Parallel iteration and list comprehensions are separate. I do prefer a
> > parallel() (merge?) builtin to the semicolon syntax, myself. You could
> > even define xparallel which is the lazy version (as in xrange).
> 
> I like this idea.  This whole parallel iteration thing could be solved
> with a single built-in and no syntax changes.
> 
>     for x, y in parallel([10, 20, 30], [1, 2]):
> 
> Or "zip", since you're zipping the lists together (i foresee potential
> geometric or concurrency-related interpretations of "parallel"):

+1 on prefering a builtin to a syntax change

>     for x, y in zip([10, 20, 30], [1, 2]):
> 
>     [(x, y+z), for (x, y) in zip((1, 2, 3, 4, 5, 6), "abc"), for z in "de"]

+1 on that too...really clear

--
Moshe Zadka <moshez@math.huji.ac.il>
There is no GOD but Python, and HTTP is its prophet.
http://advogato.org/person/moshez