Python: Генератор случайных и безопасных паролей

# Генератор паролей

import secrets

def generate_password(length=20, lower=True, upper=True, special=True):
    lower_chars = 'abcdefghijklmnopqrstuvwxyz'
    digits_chars = '0123456789'
    special_chars = '!@#$%^&*()-_=+[]{}<>?/'
    groups = [digits_chars]
    if lower:
        groups.append(lower_chars)
    if upper:
        groups.append(lower_chars.upper())
    if special:
        groups.append(special_chars)
    if length < len(groups):
        raise ValueError(f'Минимальная длина пароля: {len(groups)}')
    password = [secrets.choice(group) for group in groups]
    all_chars = ''.join(groups)
    while len(password) < length:
        password.append(secrets.choice(all_chars))
    secrets.SystemRandom().shuffle(password)
    return ''.join(password)

print(generate_password(10))