Case_2

import os


def clear():
    if os.name == 'nt':
        os.system('cls')
    elif os.name == 'posix':
        os.system('clear')


def menu():
    print('*****************************')
    print('         Todoify             ')
    print('-----------------------------')
    print('list   | List todos          ')
    print('add    | Add todo            ')
    print('check  | Check todo          ')
    print('delete | Delete todo         ')
    print('-----------------------------')
    print('save   | Save todos to file  ')
    print('load   | Load todos from file')
    print('---------------------------')


todo = []
index = 0


def list_todo():
    global todo, item
    for item in todo:
        print('[ ]', item)


def add():
    print('---------------------------')
    todo.append(input('Todo description > '))


def check():
    print('---------------------------')
    global index, item
    print(index(item))
    #for item in todo:
        #print(index, '| [ ]', item)
        #index += 1


def delete():
    del todo
    print('---------------------------')


while True:
    menu()
    selection = input('Selection > ')
    if selection == 'list':
        list_todo()
    elif selection == 'add':
        add()
    elif selection == 'check':
        check()
    elif selection == 'delete':
        pass
    elif selection == 'save':
        pass
    elif selection == 'load':
        pass

    else:
        print('                  ')
        print('ERROR: Unknown command', '(' + selection + ')')
        print('                  ')

    print('---------------------------')
    input('Press enter to continue...')
    clear()