Mohammed Altaj wrote:
> Dear All
>
> What i want to do is , my input is like
> 0 2
> 0 3
> 0 4
> 1 2
> 1 4
> 2 3
> 3 4
>
> I am comparing and put the number in group , like ,the first three lines
> , all has zero as first input for each line, so the out put should look
> like
> 0 2 3 4
> and so on
> 1 2 4
> 2 3
> 3 4
>
> I managed to do what i need , but i did in this case , there is no space
> between numbers , like
> 02
> 03
> 04
> 12
> 14
> 23
> 34
>
> so , how can i do this with spaces between numbers
with a two pass processing (one for building the output, one for its
printing), using a dict to make lists for each index (everything is
treated as strings as you do not compare nor compute them)
results = dict ()
input = file ('input.dat')
for line in input:
idx, value = line.split ()
if idx in results:
results [idx] .append (value)
else:
results [idx] = [value]
input.close ()
output = open ('output.dat', 'w')
for idx, values in results.items ():
output.write ('%s %s\n' % (idx, ' '.join (values)))
output.close ()
you can define two function, in case of your output may vary in the future.
> [snip your code]
8 levels of indentation seems really to much for a good ppiece of code
from my point of view.
my 2 cents
--
rafi
"Imagination is more important than knowledge."
(Albert Einstein)
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