Random String generator

random_string.py

import uuid
import shlex
import simplejson as json
import datetime
import random

def random_char():
    """
    Alphabetic uppercase and number 0 to 9 on a random
    selection
    """
    nums = list(range(48,58))
    alfab = list(range(65,91))
    chars = nums + alfab
    char_num = random.choice(chars)
    return chr(char_num)


def my_random_string(string_length=10):
    """Returns a random string of length string_length.

    :param string_length: a positive int value to define the random length
    :return:
    """
    a = 3
    assert string_length >= a, "No es un valor positivo sobre " + str(a)
    rand_list = [random_char() for i in range(string_length)]
    random = "".join(rand_list)
    return random