[Tutor] Tab delim file

[Liam Clarke]

Hi Srinivas,

You want to use the csv module, it's designed for this kind of stuff.

http://docs.python.org/lib/module-csv.html

So, I think for your thing you'd want = 


import csv

f1 = open('my_file.txt','r')
reader =  csv.reader(f1)
reader.delimiter = '\t'
fileA = []
fileB = []
for row in reader:
     toA = []
     toB = []
     for i in range(len(row)):
          if i <= 12:
             toA.append(row[i])
          else:
             toB.append(row[i])
     fileA.append(toA)
     fileB.append(toB)

You may want to play with this, I'm not sure if I set the reader's
delimiter right. But \t is tab.

Good luck, 

Liam Clarke


On Tue, 1 Mar 2005 14:21:58 -0800 (PST), Srinivas Iyyer
<srini_iyyer_bio at yahoo.com> wrote:
> Hello:
> 
> I have a nasty file where I have 165 column and 140K
> lines.
> 
> For every 12 columns, a new dataset is written.
> 
> 0-12 - File A's data is there
> 13-24 - File B's data is there.
> 
> My task is to write data in each 12 columns to a file.
> 
> I have a rough idea, but when I try I am unable to
> proceed further.
> 
> f1 = open('my_file.txt','r')
> aml = f1.read().split('\n')
> 
> fLine = aml[0]
> 
> k = len(fLine)/12  # k = 162/12
> 
> #So I want to jump k blocks and get the text.
> 
> for line in aml:
>    cols = line.split('\t')
>    while i > 13:
>    ......
> I am lost from here...
> 
> Every 4 line(row) contains the file name on which I
> have to write the file.
> 
> can any one plese help, i am really stuck in a
> problem.
> 
> thanks
> srini
> 
> 
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