how to select column

J. Cliff Dyer jcd at sdf.lonestar.org
Mon Apr 26 17:14:35 CEST 2010


It depends on what you mean by a column.  I assume your data is more
complex than what you've shown us.  

If your data is really single words separated by spaces, you can do:

    for line in open('file'):
        columns = line.split()
        return columns[0], columns[3]

If your columns can have spaces within them, or are separated in other
ways, you'll need something else.  

Cheers,
Cliff


On Mon, 2010-04-26 at 14:50 +0000, mannu jha wrote:
> Dear all,
> 
> I am new in python, can anyone help me that how can I select two
> column out of 6 column from a file.
> For example if I have file like:
> 
> a1 a2 a3 a4 a5 a6
> b1 b2 b3 b4 b5 b6
> c1 c2 c3 c4 c5 c6
> d1 d2 d3 d4 d5 d6 
> 
> and I want output like:
> 
> a1 a4
> b1 b4
> c1 c4
> d1 d4
> 
> then how to do
> 
> Thanks 





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