[Tutor] modular program

[Daniele]

Hi,
I'd like to write a python program which can be easily extended by other
people. Where can I find some "best practices" for writing modular programs?
I thought about a txt file containing function calls that my program will
parse and execute in order, or is it better just to execute every .py file
in a certain "module" folder (I don't like this as modules could need to be
executed in different moments)? Can any1 point me to a relatively simple
program to look at?
thanks in advance!
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