Reoedering indexes in list of list

[Toto]

Hello,

I have a list of list
assume myList[x][y] is integer
I would like to create an alias to that list which I could call this
way:
alias[y][x] returns myList[x][y]

how can I do that ? (python 2.6)

(I have a feeling I should use 'property'

Thanks,
--

 

[Chris Rebert]

Hello,

I have a list of list
assume myList[x][y] is integer
I would like to create an alias to that list which I could call this
way:
alias[y][x] returns myList[x][y]

If your "alias" can be read-only:
alias = zip(*myList)

Cheers,
Chris

 

[Toto]

If your "alias" can be read-only:
alias = zip(*myList)

a=[['00','01'],['10','11']]
l=zip(*a)
print(l)

returns... [('00', '10'), ('01', '11')]

IS NOT AT ALL WHAT I WANT ;-)

What I want is

print a[1][0]
'10'
but print l[1][0]
'01'

notice the indexes of the list l are inverted...

 

[Toto]

again I want:

alias[y][x] returns myList[x][y]

 

[Toto]

heu.... the zip trick actually works... my mistake!

 

[Arnaud Delobelle]

If your "alias" can be read-only:
alias = zip(*myList)

a=[['00','01'],['10','11']]
l=zip(*a)
print(l)

returns... [('00', '10'), ('01', '11')]

IS NOT AT ALL WHAT I WANT ;-)

What I want is

print a[1][0]
'10'
but print l[1][0]
'01'

notice the indexes of the list l are inverted...
Ahem...

a = [['00', '01'], ['10', '11']]
l = zip(*a)
a[1][0] '10'
l[1][0]

'01'

Looks *exactly* like what you want to me. It doesn't take that long to
check.

 

[Andreas Waldenburger]

Hello,

I have a list of list
assume myList[x][y] is integer
I would like to create an alias to that list which I could call this
way:
alias[y][x] returns myList[x][y]

how can I do that ? (python 2.6)

(I have a feeling I should use 'property'

The zip thing certainly seems nice. But I can never get my head around
zip quick enough to not be confused by it. So my initial idea would
have been a function:

def reverse_indices(lst, x, y):
return lst[y][x]

(or, possibly, a subclass of list with this as an additional method.)

Granted, the invocation is different from what you want, but I don't
know enough about your problem to judge whether this is an issue.

/W