list to tuple

[zxo102]

Hi,
I got several dynamic lists a1, b1, c1, .... from a python
application such as
a1 = [1,5,3,2,5,...], the len(a1) varies. Same to b1, c1, ....

With python, I would like to reorganize them into a tuple like

t1 = ((a1[0],b1[0],c1[0],...),(a1[1],b1[1],c1[1],...),...)

Anybody knows how to do that. Thanks for your help.

Ouyang

[James Stroud]

Re: list to tuple


Try the zip funciton:

py> a = [11,12,13,14]
py> b = [2,3,4,5]
py> c = [20,21,22,23,24, 25]

py> zip(a,b,c)
[(11, 2, 20), (12, 3, 21), (13, 4, 22), (14, 5, 23)]



On Thursday 11 August 2005 09:05 pm, zxo102 wrote:[color=blue]
> Hi,
> I got several dynamic lists a1, b1, c1, .... from a python
> application such as
> a1 = [1,5,3,2,5,...], the len(a1) varies. Same to b1, c1, ....
>
> With python, I would like to reorganize them into a tuple like
>
> t1 = ((a1[0],b1[0],c1[0],...),(a1[1],b1[1],c1[1],...),...)
>
> Anybody knows how to do that. Thanks for your help.
>
> Ouyang[/color]



--
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/

[Ruslan Spivak]

Re: list to tuple

"zxo102" <zxo102@gmail.c om> writes:
[color=blue]
> Hi,
> I got several dynamic lists a1, b1, c1, .... from a python
> application such as
> a1 = [1,5,3,2,5,...], the len(a1) varies. Same to b1, c1, ....
>
> With python, I would like to reorganize them into a tuple like
>
> t1 = ((a1[0],b1[0],c1[0],...),(a1[1],b1[1],c1[1],...),...)
>
> Anybody knows how to do that. Thanks for your help.
>[/color]

t1 = tuple(zip(a1, b1, c1))

I don't know your requirements, so consider also izip from itertools.

Ruslan

[Paddy]

Re: list to tuple

Try this:
[color=blue][color=green][color=darkred]
>>> a,b,c = list('tab'),lis t('era'),list(' net')
>>> a,b,c[/color][/color][/color]
(['t', 'a', 'b'], ['e', 'r', 'a'], ['n', 'e', 't'])[color=blue][color=green][color=darkred]
>>> tuple(((x,y,z) for x,y,z in zip(a,b,c)))[/color][/color][/color]
(('t', 'e', 'n'), ('a', 'r', 'e'), ('b', 'a', 't'))[color=blue][color=green][color=darkred]
>>>[/color][/color][/color]

- Paddy.

[zxo102]

Re: list to tuple

Thanks for your help.