Random Password Generator

import random
import string


rnd_letters = string.ascii_letters
rnd_letters = list(rnd_letters.strip())
helper_med = ["!", "^", "+", "%", "=", "?", "_", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
helper_med = helper_med + rnd_letters



def random_password():
    password = list()
    hard_password = list()
    answer = input("Select the security level of your password (Low/Medium/Hard)")
    if answer == "low":

        for i in range(8):
            rnd = random.randrange(0, 10)
            password.append(rnd)
        s = [str(i) for i in password]
        password = "".join(s)
        print("Your randomly created password =", password)

    if answer == "medium":

        random.shuffle(helper_med)
        for i in range(0, 12):
            a = str(helper_med[i])
            password.append(a)

        s = [str(i) for i in password]
        password = "".join(s)
        print("Your randomly created password =", password)

    if answer == "hard":

        random.shuffle(helper_med)
        for i in range(18):
            a = str(helper_med[i])
            password.append(a)

        s = [str(i) for i in password]
        password = "".join(s)
        print("Your randomly created password =", password)


random_password()