Compare 2 seperate csv files and write difference to a new csv file - Python 2.7

Question

I am trying to compare two csv files in python and save the difference to a third csv file in python 2.7.

import csv

f1 = open (\"olddata/file1.csv\")
oldFile1         


        

Answer 1

The error is correct: tuple has no "difference" method.

I guess you want to use set (and make the elements immutable)?

set1 = set([tuple(item) for item in oldList1])
set2 = set([tuple(item) for item in oldList2])