Oops. It is not possible to store functions (not their names) because
you have to extract and store Python code objects. Well, it is possible,
but it is hard and I advise you not to do this. For the function names
store their names - yes, strings - and then get the function from the
module by name using getattr.
 
I see I have to study something new. But the night is long ;-)
Thanks to showing me the way.

Petr