Using the lowercase function with CSV rows

Question

I'm trying to print all data from a csv in lowercase, but I'm not having any luck.

Here's what I have so far:

import csv
books = csv.reader(open("books.csv","rb"))

for row in books:
    print row

This prints all the content of the csv, but when I add the .lower() function, I get errors.

What am I doing wrong?

Dogbert · Accepted Answer · 2011-11-25 06:54:58Z

7

Try

print [r.lower() for r in row]

answered Nov 25, 2011 at 6:54

Dogbert

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3 Comments

mantissa45 Over a year ago

Thanks Dogbert! Question - what exactly does the "r" do in this case?

Dogbert Over a year ago

It's similar to your for row in books statement. You can change it to any variable name.

Xavier Combelle Over a year ago

to make it clear it's equivalent to print [item.lower() for item in row] it's just a variable name local to the list comprehension expression (If I'm correct it's local in Python 3.x and declarated after in Python 2.x)

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