[python-uk] Help Please

[Michael Sparks]

On Sunday 28 January 2007 22:45, Python Freak wrote:
> Hi,
>
> This may be too elementary for most of you, but could you please help me
> with the following question? I would like to use comprehensive lists and
> lists of lists. Where do I start?
>
> Question:
>
> Consider a digraph with 10 vertices, 
[snip]

Is this homework? If so, no problem, but personally I change the way I respond 
to homework questions as opposed to other things :-)

If it is, consider this:
>>> [(x,y) for x in range(y) for y in range(9) ]
[(0, 0), (0, 1), (0, 2), (0, 3), (0, 4), (0, 5), (0, 6), (0, 7), (0, 8),
 (1, 0), (1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6), (1, 7), (1, 8),
 (2, 0), (2, 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6), (2, 7), (2, 8),
 (3, 0), (3, 1), (3, 2), (3, 3), (3, 4), (3, 5), (3, 6), (3, 7), (3, 8),
 (4, 0), (4, 1), (4, 2), (4, 3), (4, 4), (4, 5), (4, 6), (4, 7), (4, 8),
 (5, 0), (5, 1), (5, 2), (5, 3), (5, 4), (5, 5), (5, 6), (5, 7), (5, 8),
 (6, 0), (6, 1), (6, 2), (6, 3), (6, 4), (6, 5), (6, 6), (6, 7), (6, 8),
 (7, 0), (7, 1), (7, 2), (7, 3), (7, 4), (7, 5), (7, 6), (7, 7), (7, 8),
 (8, 0), (8, 1), (8, 2), (8, 3), (8, 4), (8, 5), (8, 6), (8, 7), (8, 8)]

Do you see what's going on there?

Regards,


Michael.