Re: How to access elements in a list of lists?

[Chris Roy-Smith]

On 09/05/11 13:31, James Mills wrote:
On Mon, May 9, 2011 at 1:23 PM, Chris Angelico<ros...@gmail.com>  wrote:
Just learning python.
I can see that I can address an individual element of a list of lists by
doing something like:
row = list[5]
element = row[3]

This is the correct approach.

Here's an interactive example (tested):

$ python
Python 2.7.1 (r271:86832, Feb  8 2011, 10:07:16)
[GCC 4.5.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
grid = [[" " for x in range(5)] for y in range(5)]
from pprint import pprint
pprint(grid)
[[' ', ' ', ' ', ' ', ' '],
  [' ', ' ', ' ', ' ', ' '],
  [' ', ' ', ' ', ' ', ' '],
  [' ', ' ', ' ', ' ', ' '],
  [' ', ' ', ' ', ' ', ' ']]
grid[2][2] = "X"
pprint(grid)
[[' ', ' ', ' ', ' ', ' '],
  [' ', ' ', ' ', ' ', ' '],
  [' ', ' ', 'X', ' ', ' '],
  [' ', ' ', ' ', ' ', ' '],
  [' ', ' ', ' ', ' ', ' ']]


cheers
James

Thanks, that has my understanding problem fixed! And answers what would 
probably be my next question.

Regards
Chris Roy-Smith
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