[Tutor] accessing items in nested structure

[kevin parks]

def datas(x):
     pg01 = [    { (1,0) : [8, 3, 5, 4] },
             { (7,0) : [4, 3, 2, 2] },
             { (14,0) : [8, 3, 5, 4] },
             { (18,0) : [10, 2, 8, 7] },
             { (20,0) : [10, 0, 5, 7] },
             { (22,0) : [10, 2, 8, 7] },
             { (24,0) : [7, 9, 3, 8] },
             # { (25,0) : [5] },
             # { (27,0) : [0] },
             { (28,0) : [10, 0, 5, 7] },
             { (29,0) : [10, 11] },
             { (30,0) : [8, 3, 5, 4] },
             { (32,0) : [5, 0, 10, 7] },
             { (34,0) : [8, 3, 7, 9] },
             { (36,0) : [5, 4, 3, 1] },
             { (36,1) : [5, 4, 3, 1, 7] },
             { (37,0) : [0, 8, 2, 4, 9, 10, 1] },
             { (37,1) : [0, 8, 2, 4, 9, 10, 1, 6] },
             { (39,0) : [8, 10, 1, 9] },
             { (39,1) : [8, 10, 1, 9, 7] },
             { (41,0) : [2, 0, 3, 1] },
             { (41,1) : [2, 0, 3, 1, 6] }]
     return pg01[x]
#
def pctrans(seq, transposition):
     '''pctrans -- transposes pc sequence'''
     output = []
     for item in seq:
         output.append((item + transposition) % 12)
     return output
#

Hi all. My data structure is getting a little complex with a list of 
dictionaries (which are made up of a tuple key and list value). Now i 
want to be able to access each key and its list, that its i want to be 
able to iterate through this pg01 list and do something to each key and 
value(list) in the list.

Like for example print the key tuple and print the list followed by the 
list again but sorted, then list again modified by function call to the 
pctrans() func above (just to pick something at random for now) or sort 
or something. SO that i might get on output:

1,0    [8, 3, 5, 4]    [3, 4, 5, 8 ]    [4, 5, 6, 9]

etc....

I can iterate over the list and print each item, like so in the 
interpreter:

 >>> import data
 >>> x = data.datas(1)
 >>> x
{(7, 0): [4, 3, 2, 2]}

but i am not sure how to get inside the dictionaries inside the pg01 
and iterate over those and the nested list values.

Also since my dictionary keys are not consecutive numbers how can i be 
sure to hit them all?

cheers,

-kp--