How to fix “Attempted relative import in non-package” even with __init__.py

To resolve attempted relative import in non-package you should follow the following:

You need to use the following command like a package which you are not doing while you are running in your CLI:-

      pkg/ __init__.py components/ core.py __init__.py tests/ core_test.py __init__.py

To get the required output as you desire, you are required to use it as a package. And when you are running the command make sure you are outside of directory pkg at the time when you call the package from CLI.

If you want to use import components.core you can use it directly by appending the current directory to sys.path:

if __name__ == '__main__' and __package__ is None: 
from os import sys, path

sys.path.append(path.dirname(path.dirname(path.abspath(__file__))))