column selection

[mannu jha]

Hi,

I have few files like this:

24 ALA  helix (helix_alpha, helix2)


27 ALA  helix (helix_alpha, helix2)


51 ALA  helix (helix_alpha, helix4)


58 ALA  helix (helix_alpha, helix5)


63 ALA  helix (helix_alpha, helix5)

now with this program:

for line in open('1.txt'):
       columns = line.split()
       print columns[0], columns[2] 

I am trying to print only 1st and third column but it showing error like:
mruser at caf:~> python split.py
24 helix
Traceback (most recent call last):
  File "split.py", line 3, in 
    print columns[0], columns[2]
IndexError: list index out of range
nmruser at caf:~>
 how to rectify it.

Thanks,

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20100506/08c6cb76/attachment.html>