import string
import random


def generate_random_alphanumeric_string(str_length=12):
    """
    Generates a random string of length: str_length
    :param str_length: Character count of the output string
    :return: Randomly generated string
    :rtype: str
    """
    letters_and_digits = string.ascii_letters + string.digits
    return ''.join((random.choice(letters_and_digits) for i in range(str_length)))