List of lists surprising behaviour

[Boris Borcic]

candide wrote:
>
> So what is the right way to initialize to 0 a 2D array ? Is that way
> correct :
>
>
>  >>> t=[[0 for _ in range(2)] for _ in range(3)]

That's overkill :) You can skip the inner loop by using a list display, eg

t=[[0,0] for _ in range(3)]

>
> It seems there is no more trouble now :
>
>  >>> t
> [[0, 0], [0, 0], [0, 0]]
>  >>> t[0][0]=1
>  >>> t
> [[1, 0], [0, 0], [0, 0]]
>  >>>
>
> Correct ?