[Tutor] Multiple Dimension (array/list/whatever it is are).

[Thomas Clive Richards]

On Monday 10 May 2004 20:33, George Patterson wrote:
> 1. What is the data structure below called? Apart from G :-P  Is it an
> array, a list or something else. The original article was very vague on the
> commenting. See bottom of email for URL.
>
> G = {'s':{'u':10, 'x':1},
>      'u':{'v':1, 'x':2},
>      'v':{'y':4},
>      'x':{'u':3, 'v':9, 'y':2},
>      'y':{'s':7, 'v':6}
>     }
>

This is a dictionary....containing other dictionaries. They're used to provide 
key->value mappings.


>
> 2. How would I alter the above data structure such that all instances of
> 'x' ends up being equal to 5. As per sample below.
>
> {'s':{'u':10, 'x':5},
>      'u':{'v':1, 'x':5},
>      'v':{'y':4},
>      'x':{'u':3, 'v':9, 'y':2},
>      'y':{'s':7, 'v':6}
> }
>

not sure what you mean here.. doing "G['x']" would return "{'u':3, 'v':9, 
'y':2}". i.e.- another dictionary, not a numeric value...


HTH

-- 

Thomi Richards,
thomi at once.net.nz