Dice

import random

def main():
    global userIn
    userIn = input("Enter how many sides you want on your dice:  ")
    userint()
    num = random.randrange(0, userInt)
    compStr = str(num)
    print("The computer chose " + compStr)
    restart()

def userint():
    try:
        global userInt
        userInt = int(userIn)
    except ValueError:
        print("That's not a number!")
        main()
def restart():
    again = input("Play Again? Yes/No: ")
    againLower = again.lower()
    if againLower == "y" or againLower == "yes":
        main()
    elif againLower == "n" or againLower == "no":
        print("Goodbye!")
        quit()
    else:
        print("That's an invalid input")
        restart()

main()