convert list of tuples into several lists

[Pierre Barbier de Reuille]

Oliver Eichler a écrit :
> Diez B. Roggisch wrote:
> 
> 
>>zip(*[(1,4),(2,5),(3,6)])
>>
> 
> Thanks :) I knew it must be simple. The asterics - thing was new to me. 
> 
> By the way: What is faster?
> 
> this:
> 
> z = [(1,4),(2,5),(3,6)
> a,b = zip(*[(x[0], x[0]-x[1]) for x in z])
> 
> or:
> 
> a = []
> b = []
> for x in z:
>   a.append(x[0])
>   b.append(x[0]-x[1])
> 
> I guess first, isn't it?
> 
> 
> Oliver

Best answer is : try it :)
use the "timeit" module (in the standard lib) to do so ...

Pierre