Getting corresponding module from function

Question

I want to modify a module xyz and its functions like that:

def modify(fun):
    modulename = fun.__module__ # this is string. ok, but not enough

import xyz
         


        

Answer 1

You do not want to do this.

1. It does not work. Imagine you defined a function in module abc and then imported it in xyz. test.__module__ would be 'abc' when you called modify(xyz.test). You would then know to change abc.test and you would not end up modifying xyz.test at all!

2. Monkey patching should be avoided. Fooling with the global state of your program is ill-advised. Instead of doing this, why cannot you just make the new, modified thing and use it?