Two dimensional lists

[gonzlobo]

I might get an answer since I didn't call them arrays. :^)

Ok, I have 2 lists that I need to process individually, then merge
them into a 2x list and fill with data.

arinc429 = ['ab', '2b', '0b', '21', 'c1', '61', '11', 'db', '9b', '5b', 'eb',
'6b', '1b', '6e', '3e']
iPIDs = [300, 301, 320, 321]

merged[arinc429, iPIDs]

# PID & a429 are defined elsewhere

a_idx = iPIDs.index[PID]
p_idx = [arinc429.index[a429]

# shouldn't I be able to fill the lists simply by pointing to a location?

matrix[a_idx, p_idx] = 0x219 # and so on?

tia

[Peter Otten]

Re: Two dimensional lists

gonzlobo wrote:

I might get an answer since I didn't call them arrays. :^)
>
Ok, I have 2 lists that I need to process individually, then merge
them into a 2x list and fill with data.
>
arinc429 = ['ab', '2b', '0b', '21', 'c1', '61', '11', 'db', '9b', '5b',
'eb',
'6b', '1b', '6e', '3e']
iPIDs = [300, 301, 320, 321]
>
merged[arinc429, iPIDs]
>
# PID & a429 are defined elsewhere
>
a_idx = iPIDs.index[PID]
p_idx = [arinc429.index[a429]
>
# shouldn't I be able to fill the lists simply by pointing to a location?
>
matrix[a_idx, p_idx] = 0x219 # and so on?

The simplest approach is to go with a dictionary:

>>matrix = {}
>>arinc = ['ab', '2b', '0b']
>>pids = [300, 321]
>>for x in arinc:

.... for y in pids:
.... matrix[x, y] = y + int(x, 16) # replace with your actual data
....

>>matrix

{('ab', 300): 471, ('2b', 300): 343, ('ab', 321): 492, ('0b', 321): 332,
('2b', 321): 364, ('0b', 300): 311}

Get one entry:

>>matrix["2b", 321]

364

Get all items along an axis:

>>[matrix[x, 300] for x in arinc]

[471, 343, 311]

Peter