csv_convert.py

import csv
with open('data.csv', 'w', newline='') as csvfile:
    csv = csv.writer(csvfile, delimiter=',', quotechar='"', quoting=csv.QUOTE_MINIMAL)
    csv.writerow(['username','email'])
    for i in range(1,6):
        with open(r".\data{0}.txt".format(i), 'r') as fp:
            # read line 8
            x = fp.readlines()
            username = x[714].split("username -:")[1].strip()
            email = x[718].split("email -:")[1].strip()
            csv.writerow([username,email])