Can I use __init__.py to define global variables?

Question

I want to define a constant that should be available in all of the submodules of a package. I\'ve thought that the best place would be in in the __init__.py fil

Answer 1

You cannot do that. You will have to explicitely import your constants into each individual module's namespace. The best way to achieve this is to define your constants in a "config" module and import it everywhere you require it:

# mypackage/config.py
MY_CONST = 17

# mypackage/main.py
from mypackage.config import *