import random

def _create_random_password(num_chars):
    """
    Create a string of random characters
    :param num_chars:
    :return:
    """
    password_string = ''
    seed = string.ascii_letters + string.digits + string.punctuation
    seed_len = len(seed) - 1
    for x in range(0, num_chars):
        rnd = int(random.uniform(0, seed_len))
        random_char = seed[rnd:rnd+1]
        password_string += random_char
    return password_string