Generate random id (please help!)

[Kjaglewicz]

Hi All!

I need to write a function that returns a random id for an employee. Can anybody tell me why it returns... "None"? I'm stuck with it...

import random
import string

def generate_id(number_of_small_letters=4,
                number_of_capital_letters=2,
                number_of_digits=2,
                number_of_special_chars=2,
                allowed_special_chars=r"_+-!"):
    
    small_letters = string.ascii_lowercase
    capital_letters = string.ascii_uppercase
    digits = "0123456789"
    
    
    result_small = ''.join(random.choice(small_letters) for i in range (number_of_small_letters))
    result_capital = ''.join(random.choice(capital_letters) for i in range (number_of_capital_letters))
    result_digits = ''.join(random.choice(digits) for i in range (number_of_digits))
    result_special_characters = ''.join(random.choice(allowed_special_chars) for i in range (number_of_special_chars))
    
    random_characters = result_digits + result_small + result_capital + result_special_characters
    
    random_characters_list = list(random_characters.strip(" "))
   
    final_result = random.shuffle(random_characters_list)
    
    return str(final_result)