Converting List of String to Integer

[dusans]

>>> a = [['1', '2'], ['3'], ['4', '5', '6'], ['7', '8', '9', '0']]
>>> [map(int, i) for i in a]
[[1, 2], [3], [4, 5, 6], [7, 8, 9, 0]]

On Jul 21, 9:06 pm, Samir <spytho... at gmail.com> wrote:
> Hi Everyone,
>
> I am relatively new to Python so please forgive me for what seems like
> a basic question.
>
> Assume that I have a list, a, composed of nested lists with string
> representations of integers, such that
>
> a = [['1', '2'], ['3'], ['4', '5', '6'], ['7', '8', '9', '0']]
>
> I would like to convert this to a similar list, b, where the values
> are represented by integers, such as
>
> b = [[1, 2], [3], [4, 5, 6], [7, 8, 9, 0]]
>
> I have unsuccessfully tried the following code:
>
> n = []
> for k in a:
>     n.append([int(v) for v in k])
> print n
>
> Does anyone know what I am doing wrong?
>
> Thanks in advance.
>
> Samir