Calling a function in __main__ from a module?

[Marc Shapiro]

I am relatively new to python (I have used it on and off for a few small 
projects over the last few years) so I imagine that what I am trying to do 
has already been done, but practical experience, even if it is reinventing 
the wheel, is still useful, so...

I am trying to write a module to handle drop down menus using curses (on 
linux).  Curses seems to have a wrapper for the panels library, but not 
forms, or menus.  I am not even sure that the menus library would give me 
what I want (as I also do not have much curses experience in other 
languages), so I am writing my own module.

The code works fine if I include it with my application code in a singe 
file.  If I seperate out the menu class and related functions into a 
seperate module, however, then when I try to have it call a funtion in the 
man (calling) file I get an error saying:

Traceback (most recent call last):
   File "./hp", line 62, in ?
     curses.wrapper(main)
   File "/usr/lib/python2.3/curses/wrapper.py", line 44, in wrapper
     res = func(stdscr, *rest)
   File "./hp", line 58, in main
     mb.mainloop(items)
   File "/home/mns/menu.py", line 258, in mainloop
     exec cmd + "('" + name + "')"
   File "<string>", line 1, in ?
NameError: name 'NOP' is not defined

'NOP' is the name of the function that I am trying to call.  It does not 
exist in the menu module, but is in the calling (hp) module.  I can't 
qualify the name (i.e. __main__.NOP() ) since __main__ can not be used for 
qualification, only called module names can be used that way.

How do I get the module to call functions in a parent module.  Tkinter 
would set up a callback function and bind it to an event.  Can something 
similar be done for a console program using curses?

-- 
Marc Shapiro


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