Cutting a deck of cards

[MRAB]

On 26/05/2013 18:52, RVic wrote:
> Suppose I have a deck of cards, and I shuffle them
>
> import random
> cards = []
> decks = 6
> cards = list(range(13 * 4 * decks))
> random.shuffle(cards)
>
> So now I have an array of cards. I would like to cut these cards at some random point (between 1 and 13 * 4 * decks - 1, moving the lower half of that to the top half of the cards array.
>
> For some reason, I can't see how this can be done (I know that it must be a simple line or two in Python, but I am really stuck here). Anyone have any direction they can give me on this? Thanks, RVic, python newbie
>
The list from its start up to, but excluding, index 'i' is cards[ : i],
and the list from index 'i' to its end is cards[i : ].

Now concatenate them those slices.