How to load function from string named module?

Question

I have structure:

modules
 __init__.py
 version_1.py
 version_2.py
settings.py
my_script.py
__init__.py

In file version_1 and version_2 I have two versions the same function:

def ext_function(*args, **kwargs):
 # something

I want to define in file settings.py what version have been loaded:

EXT_MODULE = 'modules.version_1'

and execute function in my_script like this:

settings.EXT_MODULE.ext_function(args)

How to do it? EXT_MODULE is a string so I can not execute function like this.

Answer 1

You can use the importlib module:

import importlib
module = importlib.import_module(settings.EXT_MODULE)
module.ext_function(args)