It seems that in your mf3.py you are importing beyond the top level. Let’s suppose that your project structure is as follows: folder/ main.py mod/ __init__.py components/ __init__.py expander.py language_id.py utilities/ __init__.py functions.py First make sure that main.py refers to the subpackages as: from mod.components.expander import * from mod.utilities.functions import * expander.py and language_id.py have … Read more
Python adds the folder containing the script you launch to the PYTHONPATH, so if you run python test/tests.py Only the folder test is added to the path (not the base dir that you’re executing the command in). Instead run your tests like so: python -m test.tests This will add the base dir to the python … Read more
TL;DR: You can’t do relative imports from the file you execute since __main__ module is not a part of a package. Absolute imports – import something available on sys.path Relative imports – import something relative to the current module, must be a part of a package If you’re running both variants in exactly the same … Read more
Script vs. Module Here’s an explanation. The short version is that there is a big difference between directly running a Python file, and importing that file from somewhere else. Just knowing what directory a file is in does not determine what package Python thinks it is in. That depends, additionally, on how you load the … Read more