moduleNotFoundError: no module named (*)

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 I'm trying to run my tests using python -m pytest but I get an error that ModuleNotFoundError: No module named 'sample' When using nosetests or anything else it works fine, but when trying to use pytest, it doesn't work. My tree looks like below, do you have any advice why it doesn't work?

├── LICENSE.txt
├── README.md
├── data
│   └── data_file
├── exported_register.csv
├── pyproject.toml
├── requirements.txt
├── setup.cfg
├── setup.py
├── src
│   └── sample
│       ├── __init__.py
│       ├── __pycache__
│       │   ├── __init__.cpython-39.pyc
│       │   ├── dziennik.cpython-39.pyc
│       │   ├── przedmiot.cpython-39.pyc
│       │   ├── simple.cpython-39.pyc
│       │   └── uczen.cpython-39.pyc
│       ├── dziennik.py
│       ├── package_data.dat
│       ├── przedmiot.py
│       ├── simple.py
│       └── uczen.py
├── tests
│   ├── __init__.py
│   ├── __pycache__
│   │   ├── __init__.cpython-39.pyc
│   │   ├── test_ASSERTPY_uczen.cpython-39-pytest-6.2.1.pyc
│   │   ├── test_ASSERTPY_uczen.cpython-39-pytest-6.2.5.pyc
│   │   ├── test_ASSERTPY_uczen.cpython-39.pyc
│   │   ├── test_PYHAMCREST_uczen.cpython-39-pytest-6.2.1.pyc
│   │   ├── test_PYHAMCREST_uczen.cpython-39-pytest-6.2.5.pyc
│   │   ├── test_PYHAMCREST_uczen.cpython-39.pyc
│   │   ├── test_UNITTEST_register.cpython-39-pytest-6.2.1.pyc
│   │   ├── test_UNITTEST_register.cpython-39-pytest-6.2.5.pyc
│   │   ├── test_UNITTEST_register.cpython-39.pyc
│   │   ├── test_UNITTEST_uczen.cpython-39-pytest-6.2.1.pyc
│   │   ├── test_UNITTEST_uczen.cpython-39-pytest-6.2.5.pyc
│   │   ├── test_UNITTEST_uczen.cpython-39.pyc
│   │   ├── test_simple.cpython-39-pytest-6.2.1.pyc
│   │   ├── test_simple.cpython-39-pytest-6.2.5.pyc
│   │   └── test_simple.cpython-39.pyc
│   ├── test_ASSERTPY_uczen.py
│   ├── test_PYHAMCREST_uczen.py
│   ├── test_UNITTEST_register.py
│   ├── test_UNITTEST_uczen.py
│   └── test_simple.py
└── tox.ini
modulenotfounderror pytest python
2 Answers

When you run pytest with python -m pytest it uses the current directory as it its working dir, which doesn't contain the sample module (located inside ./src). The way I deal with this is I have a conftest.py inside my tests directory where I add my source dir to python path something like this:

import sys
from pathlib import Path

source_path = Path(__file__).parents[1].joinpath("src").resolve()
sys.path.append(str(source_path))
user_145362150

I've recently started using pytorch and have had similar problems. Couple steps come to mind:

  1. How are you writing the .py file that contains the tests? It may simply be that you need to change up how you import sample within the unit test file. I would expect that you need something like import src.sample.simple. In other words, could be just a pathing issue.
  2. Try a (much) simpler folder structure and try again. If that doesn't work, try to just copy an example of a simple scheme that someone has posted. That is, just get python -m pytest to run somehow, then start slowly adding the complexities of your project.
user_92052100
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