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To: python-list@python.org
From: Dave Angel <davea@davea.name>
Subject: Re:parse a csv file into a text file
Date: Wed, 5 Feb 2014 19:57:26 -0500 (EST)
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Xref: csiph.com comp.lang.python:65497

 Zhen Zhang <zhen.zhang.uoft@gmail.com> Wrote in message:
> Hi, every one.
> 
> I am a second year EE student.
> I just started learning python for my project.
> 
> I intend to parse a csv file with a format like 
> 
> 3520005,"Toronto (Ont.)",C  ,F,2503281,2481494,F,F,0.9,1040597,979330,630.1763,3972.4,1
> 2466023,"Montréal (Que.)",V  ,F,1620693,1583590,T,F,2.3,787060,743204,365.1303,4438.7,2
> 5915022,"Vancouver (B.C.)",CY ,F,578041,545671,F,F,5.9,273804,253212,114.7133,5039.0,8
> 3519038,"Richmond Hill (Ont.)",T  ,F,162704,132030,F,F,23.2,53028,51000,100.8917,1612.7,28
> 
> into a text file like the following
> 
> Toronto 2503281
> Montreal 1620693
> Vancouver 578041
> 
> I am extracting the 1st and 5th column and save it into a text file.

Looks to me like columns 1 and 6.

> 
> This is what i have so far.
> 
> 
> [code]
> 
> import csv
> file = open('raw.csv')
> reader = csv.reader(file)
> 
> f = open('NicelyDone.text','w')
> 
> for line in reader:
>       f.write("%s %s"%line[1],%line[5])

Why not use print to file f? The approach for redirection is
 different between python 2 and 3, and you neglected to say which
 you're using. 
> 

> 
> My thinking is that I could add those 2 string together like c=a+' ' +b, that would give me the format i wanted.

And don't forget the "\n" at end of line. 

> So i can use f.write() to write into a file  ;) 

Or use print, which defaults to adding in a newline.

> Sorry if my questions sounds too easy or stupid.
> 

Not in the least.

> 
> 


-- 
DaveA