Python: how to import from all modules in dir?

Question

Dir structure:

main.py
my_modules/
   module1.py
   module2.py

module1.py:

class fooBar():
    ....
class pew_pew_FooBarr()
    ....
...

How can I add all classes from module* to main without prefixes (i.e. to use them like foo = fooBar(), not foo = my_modules.module1.fooBar()).

An obvious decision is to write in main.py something like this:

from my_modules.module1 import *
from my_modules.module2 import *
from my_modules.module3 import *
...

But I don't want to change main.py when I create new moduleN. Is there solution for that?

I do know it's not a good idea to import classes like this, but I'm still curious about that.

UPD: This question differs from this one Loading all modules in a folder in Python, because my problem is to load modules without namespaces.

Answer 1

In the my_modules folder, add a __init__.py file to make it a proper package. In that file, you can inject the globals of each of those modules in the global scope of the __init__.py file, which makes them available as your module is imported (after you've also added the name of the global to the __all__ variable):

__all__ = []

import pkgutil
import inspect

for loader, name, is_pkg in pkgutil.walk_packages(__path__):
    module = loader.find_module(name).load_module(name)

    for name, value in inspect.getmembers(module):
        if name.startswith('__'):
            continue

        globals()[name] = value
        __all__.append(name)

Now, instead of doing:

from my_modules.class1 import Stuff

You can just do:

from my_modules import Stuff

Or to import everything into the global scope, which seems to be what you want to do:

from my_modules import *

The problem with this approach is classes overwrite one another, so if two modules provide Foo, you'll only be able to use the one that was imported last.