Menu Interface Problem.

[Gabriel Genellina]

En Tue, 10 Mar 2009 03:48:07 -0200, Paulo Repreza <pxrepreza at gmail.com>  
escribió:

> # Program exits until 'menu_item = 9'
> while menu_item != 9:
>     print '-----------------'
>     print '1. Print the list.'
>     print '2. Add a name to the list.'
>     print '3. Remove a name from the list.'
>     print '4. Change an item in the list.'
>     print '9. Quit'
>     menu_item = input('Pick an item from the menu: ')
>
>     # TO-DO for option '1'.
>     if menu_item == 1:

input() is rather confusing (and is gone in Python 3). It does two things:
- retrieve some text typed by the user
- evaluate it as if it were an expresion
That means that typing 1+2 works (and will choose option 3), but typing f  
will raise an exception (there is no "f" variable). I suggest you forget  
about input and use raw_input instead:

     menu_item = raw_input('Pick an item from the menu: ')

This returns a string (like '1'). So change all your "if" statements  
accordingly:

     # TO-DO for option '1'.
     if menu_item == '1':

-- 
Gabriel Genellina