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
modify(xzy.test)

My problem is how to access the namespace of xzy inside modify. Sometimes

globals()[fun.__module__]

works. But then I get problems if the definition modify is in a different file than the rest of
the code.

Answer 1

You want to get the module object from its name? Look it up in the sys.modules dictionary that contains all currently loaded modules:

import sys

def modify(func):
    module = sys.modules[func.__module__]