List Manipulation

[Bruno Desthuilliers]

Roman wrote:
(please dont top-post - corrected)
> 
> Iain King wrote:
> 
>>Roman wrote:
>>
>>>I would appreciate it if somebody could tell me where I went wrong in
>>>the following snipet:
>>>
(snip)

>>What are you trying to do here?  p[:0]  returns a new list, of all the
>>elements in p up to element 0 (which is of course the empty list),
>>which is then appended to, but is not stored anywhere.  If you want to
>>insert str(col) then use p.insert
>>
>>
>>Iain
> 
> 
> Thanks for your help
> 
> My intention is to create matrix based on parsed csv file. So, I
> would like to have a list of columns (which are also lists).

csv = [
   ['L0C0', 'L0C1', 'L0C2'],
   ['L1C0', 'L1C1', 'L1C2'],
   ['L2C0', 'L2C1', 'L2C2'],
 ]

matrix = [[[] for l in range(len(csv))] for c in range(len(csv[0]))]

for numline, line in enumerate(csv):
    for numcol, col in enumerate(line):
        matrix[numcol][numline] = col

assert matrix == [
   ['L0C0', 'L1C0', 'L2C0'],
   ['L0C1', 'L1C1', 'L2C1'],
   ['L0C2', 'L1C2', 'L2C2']
 ]

NB : There are probably more elegant solutions.

> I have made the following changes and it still doesn't work.

"doesn't work" is the worst possible description of a problem...

(snip)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"