Loading functions from file

I want to load two functions from an external file. I know where the file will be, but I want to know how to load the file. The reason for this is that two programs will be using the file.

Basically:
How should I load the file to ensure that someone doesn't hack it (or at least prevent it)?
Is it worth it or should I just copy-paste the two long function definitions into both programs?

Why don't you just use

os.loadAPI(pathToFile)

If someone has the ability to edit your code, your security is inherently failed. What exactly is the use case of this?

Kaleb I can understand why you would do this, for example if you have some code that works as:

"draw menu" "Items"

Save it into a central repository, and you can use it for all your apps whenever you want a menu. Update the code, it updates everywhere.



Security wise, its the exact same as coding it in 1 file, if they can edit the main file, they can edit the function file also.