Sample creation of base64 strings not as hashes.

base62.py

import random
import argparse


def get_key(length: int = 8) -> str:
    b62_alphabet = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$+"
    key = random.choices(b62_alphabet, k=length)
    return ''.join(key)


def main():
    parser = argparse.ArgumentParser(
        description='Creates random base64 strings.')
    parser.add_argument(
        '-l',
        action='store',
        dest='length',
        type=int,
        default=8,
        help='length of the string(s) to create')
    parser.add_argument(
        '-n',
        action='store',
        dest='num',
        type=int,
        default=1,
        help='the number of strings to create')

    args = parser.parse_args()

    for i in range(args.num):
        print(get_key(args.length))


if __name__ == '__main__':
    main()