Import all files from a folder on python

Question

I have a folder with a few python files:

modules
|--> __init__.py
|--> car.py
|--> plane.py
|--> ship.py
|--> etc...

Each of this files consists on this:

car.py

NAME = "car_name"
def mainloop(*args):
    ...
    return whatever

plane.py

NAME = "some_different_name"
def mainloop(*args):
    ...
    return whatever

and so on...

I want to import them dynamically from my parent dir as a dict like this:

from modules import modules
print(modules)
{
    "car_name": <function mainloop at ...>,    
    "some_different_name": <function mainloop at ...>,
    etc..
}

I don't know how many files will be on the folder or the filenames. How can I do it?

Answer 1

modules.py :

import os, importlib
fs = [f for f in os.listdir('.') if f.endswith('.py')]
modules = {m.NAME: m.mainloop for m in map(importlib.import_module, fs)
               if hasattr(m, 'mainloop')}