[Tutor] Extracting columns from many files to different files

[Joel Goldstick]

On Mon, Jul 16, 2012 at 12:11 PM, taserian <taserian at gmail.com> wrote:
> On Mon, Jul 16, 2012 at 10:58 AM, susana moreno colomer
> <susana_87 at hotmail.com> wrote:
>>
>> Hi!
>> I have a folder, with the following text files with columns:
>>
>> bb_ 1
>> bb_2
>> ww_1
>> ww_2
>> ff_1
>> ff_2
>>
>> What I want to do is:
>>
>> Extract columns 5,6, 8 from files bb_
>> Extract columns 3,4 from files ww_
>> Get 5 files, corresponding to different columns:
>> Files (excel files): 'ro' with colums number 5,  'bf' with colums number
>> 6,  'sm' with column 8,  'se' with columns number 3 and  'dse' with columns
>> number 4
>
> How are these columns separated? Blank spaces, tabs, commas?
>
> I'm mostly worried about:
>
>
> for b in line:
>     A.append(b[5].strip())
>     B.append(b[6].strip())
>     C.append(b[8].strip())
>
> For the A List, this will take the 5th character from the line, not the 5th
> column. You may need to split the line based on the separators.
>
> AR
>
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To make your code show correctly you must set your email program to
write text and not html.  You should also set your text editor to turn
tabs into 4 spaces.  Tabs work in python, but you can't mix tabs and
spaces, so it is less of a problem if you only use spaces for
indenting


-- 
Joel Goldstick