Working Around "modulenotfounderror: ...'__main__' Is Not A Package" Error

I've got a project running on a server with the structure proj __init__.py module_a.py module_b.py main.py And in the header of main.py, I import from other module

Solution 1:

Keep your imports relative, without using the package full path, so that you have the flexibility of renaming it as you wish, like in

from .module_aimport func1

Then in your local environment, change your current dir to the proj parent folder and run:

python -m proj.main

An alternative would be to rename main.py to __main__.py and then just writing

python -m proj

will do. But that may affect the behaviour on the server if you copy the files as is.

Packages are usually to be imported. This is a common problem when we start running from arbitrary scripts located inside the package (in this case main.py). If the package is simply imported from outside, everything works.