Password-Manager with Salt and Pepper (commented version will follow soon)

from hashlib import pbkdf2_hmac

lower_case = list("abcdefghijklmnopqrstuvwxyz")
upper_case = list("ABCDEFGHJKLMNOPQRTUVWXYZ")
numbers = list("0123456789")
special_char = list("!§$%&/()=?[],.-")
password_chars = lower_case + upper_case + numbers + special_char
salt = "pepper"

def convert_bytes_to_password(hashed_bytes, length):
    number = int.from_bytes(hashed_bytes, byteorder="big")
    password = ""
    while number > 0 and len(password) < length:
        password = password + password_chars[number % len(password_chars)]
        number = number // len(password_chars)
    return password

master_password = input("Master Password: ")
domain = input("Website: ")

while len(domain) < 1:
    print("Enter a Website you want to generate the password for: ")
    domain = input("Website: ")

hash_string = domain + master_password

hashed_bytes = pbkdf2_hmac("sha512",
                            hash_string.encode("utf-8"),
                            salt.encode("utf-8"),
                            4096)

print("Passwort: " + convert_bytes_to_password(hashed_bytes, 10))