[Tutor] (no subject)

[Mark Rowe]

--- Pijus Virketis <virketis@fas.harvard.edu> wrote:
> Hi,
> 
> I am not quite sure what you mean by
> "two-dimensional" list, so I'll just show
> what I would think of as a 2D list myself. Consider
> this:
> 
> >>> L = [[1, 2, 3], [4, 5,6], [7, 8, 9]]
> 
> This list of three list could be seen as a rough
> replication of the matrix:
> 
> 1 2 3
> 4 5 6
> 7 8 9
> 
> The list can be indexed somewhat like a matrix:
> 
> >>> print L[1][2]
> 2
> 
> We asked for the first row and second column, and
> got the right number. This
> could do the job for you.
[snip]
> Cheers, 
> 
> Pijus
> 

That would actually return 6 in the example that you
used.  This is because sequences are indexed starting
at zero.  Therefore you were probably looking for:

>>> print L[0][1]
2

Mark Rowe

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