def mainMenu():
    print("1. option 1")
    print("2. option 2")
    print("3. Quit")
    try:
        selection=int(input("Enter choice: "))
        if selection==1:
            option1()
        elif selection==2:
            option2()
        elif selection==3:
            exit
        else:
            print("Invalid choice. Enter 1-3")
            mainMenu()
    except ValueError:
        print("Invalid choice. Enter 1-3")

def option1():
    print("test 1")
    mainMenu()

def option2():
    print("test 2")
    mainMenu()


def exit():
    print("test 3")
    mainMenu()