import string
import random


def generate_random_string(length):
    """
    just that...generate a random string

    arguments
        length : int
            length of random string
    returns
        _string : str
            random string
    """
    res = ''.join(random.choices(string.ascii_uppercase +
                             string.digits, k = length))
    _string = str(res)
    return _string