how to select column

mannu jha mannu_0523 at
Mon Apr 26 16:50:51 CEST 2010

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

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