Importing module from sub-directory works in Python 2, but not Python 3

Question

So I have directory with following structure:

> current_directory
    > submodule
        /__init__.py
        /some_module.py
    /main.py

In the __init__.py file the following statement is present:

from some_module import some_funciton

Whilst in the main.py the whole submodule is imported with: import submodule.

Now, this executed perfectly fine with Python 2, but the issue is that in Python 3 the import statement in __init__.py raises an ImportError exception: `No module named 'some_module'.

What is the difference between Python 2 and Python 3 when it comes to specifying the hierarchy of the imported files, and how would I go about adjusting the code to work with Python 3?

that should work. The only issue would be with `from x import y` statements. Are you sure you're not using `from` ? — Jean-François Fabre, Jul 31 '17 at 12:06
Yes, I am. I simplified the problem too much for the presentation of the question. I'll edit it quickly. — Bruno KM, Jul 31 '17 at 12:11

score 2 · Accepted Answer · answered Jul 31 '17 at 12:11

2

In python 3 relative imports are supported only in the form from . import submodule.

You should either rewrite your import statement or make the import absolute by adding project directory to python path:

export PYTHONPATH=current_directory
python main.py

answered Jul 31 '17 at 12:11

Yossi

11,778
2
53
66

Thanks, that clears it up! Someone linked an answer to a different question that included this link: https://www.python.org/dev/peps/pep-0328/ . Which was also very helpful. – Bruno KM Jul 31 '17 at 12:22

Importing module from sub-directory works in Python 2, but not Python 3

1 Answers1

Linked