Importing a package into all modules in a directory

Question

What is the most canonical way to import a package into multiple files? Is the best way to import into a common module and then import that, or is there a way to do it somewhere like __init__.py?

This is the repetition I'm trying to avoid:

file1.py

from typing import NoReturn
...

file2.py

from typing import NoReturn
...

file3.py

from typing import NoReturn
...

Answer 1

Practically no. The NoReturn or whatsoever must be imported from somewhere.

You could "inject" an attribute to a module from "outside" like this:

# this is __init__py

from typing import NoReturn

from . import file1
from . import file2

file1.NoReturn = file2.NoReturn = NoReturn

but:

• it's an ugly hack,
• the attribute is added after the import, so it is of limited use:

ie

# this is file1.py

def func() -> NoReturn:   # will fail, NoReturn undefined at import time
    raise ...