I need to compare two CSV files and print out differences in a third CSV file.
In my case, the first CSV is a old list of hash named old.csv and the second CSV is the new list of hash which contains both old and new hash.
Here is my code :
import csv
t1 = open('old.csv', 'r')
t2 = open('new.csv', 'r')
fileone = t1.readlines()
filetwo = t2.readlines()
t1.close()
t2.close()
outFile = open('update.csv', 'w')
x = 0
for i in fileone:
if i != filetwo[x]:
outFile.write(filetwo[x])
x += 1
outFile.close()
The third file is a copy of the old one and not the update.
What's wrong ? I Hope you can help me, many thanks !!
PS : i don't want to use diff
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