generate-password.py

import string
import random
import argparse

def generate_password(size=8, chars=string.ascii_letters + string.digits, punctuation=False):
    if punctuation:
        chars = chars + "!@#$*?"
    
    return ''.join(random.SystemRandom().choice(chars) for _ in range(size))

def main():
    arg_parser = argparse.ArgumentParser(prog='generate-password')
    arg_parser.add_argument('-l', '--length', required=False, metavar='<password length>', dest='password_length', type=int, default=8, help='determine how many characters the generated password will have.')
    arg_parser.add_argument('-p', '--punctuation', required=False, action='store_true', dest='use_punctuation', default=False, help='determine if the generated password should include punctuation characters.')
    args = arg_parser.parse_args()

    password = generate_password(size=args.password_length, punctuation=args.use_punctuation)
    print("Your generated password: %s" % password)

if __name__ == "__main__":
    main()