testing non-exported methods in python

Question

My code is organized this way:

app/sampling
├── __init__.py
├── filters.py
└── test
    └── filters_test.py

On filters.py there are some exported functions (included in __init__.py) and some unexported functions, that begin with underscore.

On filters_test.py I have no trouble testing the exported functions, that I can access like this:

from app.sampling import exported_function

(note that "app" is part of my PYTHONPATH)

But then if I try to import a private function like this:

from ..filters import _private_function

This seems to work but then on runtime:

SystemError: Parent module '' not loaded, cannot perform relative import

Additional notes:

Krzysztof Słowiński · Accepted Answer · 2017-12-19 21:59:07Z

3

from app.sampling.filters import _private_function

answered Dec 19, 2017 at 21:59

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