Python how to write a set of tuples to csv

Question

Hi total Newb here and trying to get a mastery of working with lists, sets and tuples. How can I convert the following code into a csv file.

print((output2).difference(output1))

The full code is found below.

import csv

f1 = open ("ted.csv")
oldFile1 = csv.reader(f1, delimiter=',')
oldList1 = list(oldFile1)

f2 = open ("ted2.csv")
newFile2 = csv.reader(f2, delimiter=',')
newList2 = list(newFile2)

f1.close()
f2.close()

output1 = set(tuple(row) for row in newList2 if row not in oldList1)
output2 = set(tuple(row) for row in oldList1 if row not in newList2)


print((output2).difference(output1))

Thanks

Answer 1

This should do the trick. You want the writerow or writerows method, re.: the csv module. Here it is with writerow :

import csv

f1 = open ("ted.csv")
oldFile1 = csv.reader(f1, delimiter=',')
oldList1 = list(oldFile1)

f2 = open ("ted2.csv")
newFile2 = csv.reader(f2, delimiter=',')
newList2 = list(newFile2)

f1.close()
f2.close()

output1 = set(tuple(row) for row in newList2 if row not in oldList1)
output2 = set(tuple(row) for row in oldList1 if row not in newList2)

with open('Michal_K.csv','w') as csvfile:
        wr = csv.writer(csvfile,delimiter=',')
        for line in (output2).difference(output1):
            wr.writerow(line)