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IS MY VENV HAUNTED? DOTENV VANISHES THE MOMENT THE DOCKER IMAGE TAKES OVER !!

Solvedpippythonvenv18 replies · 550 views · started
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Accepted solution by Una Walsh — ahh classic watch out for package name vs import name. pip install python dotenv gives u import dotenv, psycopg2 binary gives import…
  1. Wes T.
    @wes_loose

    i swear i installed it. pip install dotenv finished cleanly, pip list shows it, and when i run the app by hand everything works. then the Docker image starts it and i get this:

    PS C:\scripts> python sync_reports.py

    PS C:\scripts> python sync_reports.py
Traceback (most recent call last):
  File "C:\scripts\sync_reports.py", line 3, in <module>
    import requests
ModuleNotFoundError: No module named 'requests'
PS C:\scripts> pip install requests
Requirement already satisfied: requests in c:\users\...\python311\lib\site-packages
PS C:\scripts> python sync_reports.py
ModuleNotFoundError: No module named 'requests'

    same server, same repo, same user (i think). ive reinstalled three times and even nuked teh venv once. what am i missing?

    For context, this is Python 3.11 on a plain Linux VM, nothing exotic. Im fine at writing Python but environments have always felt like dark magic to me. Any pointers on how to see what teh service actually sees would be amazing. any ideas??

    5
  2. Una Walsh
    @una_shader-1dm

    Did you install with pip or python -m pip, and was teh venv active at that moment? ??

    1 0 helpful
  4. Noah Ferreira
    @noahf554

    ok update: did what @harutor769 said and its fine now owe u a beer 🍺

    1 0 helpful
  5. Esme Jansen
    @ciphersmith

    in Docker, the classic mistake is installing into one stage of a multi-stage build and copying only the app into the final stage... either copy the venv over (COPY --from=build /opt/venv /opt/venv and put /opt/venv/bin on PATH) or install in teh final stage.

    0 1 helpful
  6. Sara Alvarez
    @stack_deck336

    Print sys.path at startup in the failing context, if u see a different site-packages than teh one where pip put the package, you have your answer in one log line. worked for me anyway 🤷

    3 2 helpful
  8. Vik Larsen
    @vikl69

    ahh classic almost always this is two different inteprreters. compare them directly:

    which python
python -c "import sys; print(sys.executable)"
python -m pip --version

    Then check what the Docker image (or service) actually calls 😭 If the unit or script says /usr/bin/python3, it will never see packages from your venv, point it at /path/to/venv/bin/python explicitly. lmk how it goes

    0 3 helpful
  9. Haruto R.
    @harutor769

    have u checked your pip settings? mine were reset after an update

    1 3 helpful
  10. Kenji Silva
    @kenji_shader

    wait wait does this also apply to python? ??

    4 0 helpful
  11. Zora Stone
    @zora.stone
    in reply to @kenji_shader

    oof activating a venv only changes PATH in ur interactive shell. Services, cron and IDE run configs do not inherit that. For systemd set ExecStart=/opt/app/venv/bin/python app.py (or venv/bin/gunicorn), and for cron use teh full path too. worked for me anyway 🤷

    1 0 helpful
  12. Caleb R.
    @caleb.rahman
    in reply to @zora.stone

    yeahhh stop using bare pip 🙏 Use python -m pip install python-dotenv with the exact interpreter that runs the app. That way the package lands in the same site-packages that the interpreter searches.

    4 0 helpful
  13. Caleb R.
    @caleb.rahman

    how is this thread still going lmao

    7 0 helpful
  15. Caleb R.
    @caleb.rahman

    not gonna lie this is driving me nuts ok this thread just saved my weekend... pro tip: write down what u change, i didnt and had to redo venv from scratch

    5 0 helpful
  17. Caleb R.
    @caleb.rahman

    lol this thread is gold. dumb question but how do i even check the update pls help 🙏

    rage

    0 2 helpful
  18. Una Walsh
    @una_shader-1dm
    Accepted solution

    ahh classic watch out for package name vs import name. pip install python-dotenv gives u import dotenv, psycopg2-binary gives import psycopg2, PyYAML gives import yaml. If you installed a simliarly named but different package teh import will fail even tho pip is happy.

    0 6 helpful
  19. Wes T.
    @wes_loose
    in reply to @una_shader-1dm

    @una_shader-1dm holy cow changed the Docker image to call /opt/app/venv/bin/python directly and it started first try, two interpreters this whole time 🤦 thank u! cant believe it was that simple lol

    2 0 helpful

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