how to select column

Gary Herron gherron at
Mon Apr 26 17:14:21 CEST 2010

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 

Do you know how to open a file, and how to read individual lines from it?

If so, then you can split a line at the spaces into a list by using
  fields = line.split()
  print fields[0], fields[3]
would do what you ask.

Gary Herron

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