password.py

# simple password generator

# https://docs.python.org/3/library/secrets.html#recipes-and-best-practices

import argparse
import secrets
import string

# todo: add args for specialchars etc
# specify min numbers of capital letters, digits, etc.

digits = list(string.digits)
alphabets = list(string.ascii_letters)
specialchars = list("!@#$%^&*()")

def generatePassword(length, allow_digits, allow_alphabets, allow_specialchars):
    length = int(length)

    if length <= 4:
        print("too short, length should be at least 4 chars")
        exit()
    elif length >= 70:
        print("too long, use length less than 70")

    chars = []
    if allow_digits == True:
        chars += digits
    if allow_alphabets == True:
        chars += alphabets
    if allow_specialchars == True:
        chars += specialchars

    return ''.join(secrets.choice(chars) for i in range(length))


if __name__ == "__main__":

    parser = argparse.ArgumentParser(description='generate a random password')
    parser.add_argument('-l', '-length', '--length', type=int, nargs="?", default=20)
    args = parser.parse_args()

    p = generatePassword(length=args.length, allow_digits=True, allow_alphabets=True, allow_specialchars=False)
    print(p)