generate_iban.py

import random

if __name__ == "__main__":
    countrynum = "121400"  # de
    bankcode = "10020000"

    for i in range(1, 25):
        accno = str(random.randrange(1000000000, 1999999999))
        bban = bankcode + accno
        checksummod = int(bban + countrynum) % 97
        cg = 98 - checksummod
        print("DE" + "{:02d}".format(cg) + bban)