Kindly show me a better way to do it

[Günther Dietrich]

Tycho Andersen <tycho at tycho.ws> wrote:

>On Sat, May 8, 2010 at 3:41 PM, Oltmans <rolf.oltmans at gmail.com> wrote:
>> Hi, I've a list that looks like following
>>
>> a = [ [1,2,3,4], [5,6,7,8] ]
>>
>> Currently, I'm iterating through it like
>>
>> for i in [k for k in a]:
>>        for a in i:
>>                print a
>>
>> but I was wondering if there is a shorter, more elegant way to do it?
>
>How about itertools? In python 2.6:
>
>>>> a = [ [1,2,3,4], [5,6,7,8] ]
>>>> from itertools import chain
>>>> for i in chain(*a):
>...     print i
>...
>1
>2
>3
>4
>5
>6
>7
>8


Why not this way?

>>> a = [[1,2,3,4], [5,6,7,8]]
>>> for i in a:
...     for j in i:
...         print(j)
... 
1
2
3
4
5
6
7
8

Too simple?



Best regards,

Günther