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

Question

I'm trying to follow PEP 328, with the following directory structure:

pkg/

   __init__.py 

   components/ 

      Core.py

      __init__.py 

   tests/ 

     Core_test.py

     __init__.py

In core_test.py I have the following import statement

from ..components.core import GameLoopEvents

However, when I run, I get the following error:

tests$ python core_test.py

 Traceback (most recent call last):

   File "core_test.py", line 3, in <module> 

     from ..components.core import GameLoopEvents 

 ValueError:   Attempted relative import in non-package

Is there anything I'm missing here?

Answer 1

• 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 desired output as you want you to need 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__))))

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