Question about nested loop

Mon Dec 31 17:02:52 EST 2012

On Monday, December 31, 2012 5:25:16 AM UTC-6, Gisle Vanem wrote:
> "Isaac Won" <winefrog at gmail.com> wrote:
>>>> > while c < 10:
>> > c = c + 1
>> > 
>> > for columns in ( raw.strip().split() for raw in f ):
>> > 
>> > 
>> > b.append(columns[c])
>> > 
>> > y = np.array(b, float)
>> > print c, y
>> > 
>> > 
>> > I thought that can get the arrays of the columns[5] to [10],
>> > but I only could get repetition of same arrays of columns[5].
>>>> I don't pretend to know list comprehension very well, but 
>> 'c' isn't incremented in the inner loop ( .. for raw in f). 
>> Hence you only append to columns[5].
>>>> Maybe you could use another 'd' indexer inside the inner-loop?
>> But there must a more elegant way to solve your issue. (I'm a
>> PyCommer myself).
>>>> --gv

Thank you for your advice.
 I agree with you and tried to increment in inner loop, but still not very succesful. Anyway many thanks for you.