infile1 = open("nzpms.csv", 'r')
infile2 = open("byelection.csv", 'r')

l1 = infile1.readlines()
l2 = infile2.readlines()
for i in l1:
    b = i.split(",")
    if b[0] in l2:
        print b[0]

infile1.close()
infile2.close()