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pythondockerdockerfilerequirements.txt

getting an error while running docker compose for first time

I'm trying to setup Docker for my first time ever and I've encountered the following error while running the command: docker compose up --build

8.892 ERROR: Could not find a version that satisfies the requirement pywin32==306 (from versions: none)
8.893 ERROR: No matching distribution found for pywin32==306
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failed to solve: process "/bin/sh -c pip install -r requirements.txt" did not complete successfully: exit code: 1

dockerfile:

FROM python:3

ENV PYTHONUNBUFFERED=1

WORKDIR /code

COPY requirements.txt .

RUN pip install -r requirements.txt

COPY . .

EXPOSE 8000

CMD ["python","manage.py","runserver"]`

requirements.txt:

asgiref==3.7.2
backports.zoneinfo==0.2.1
certifi==2024.2.2
charset-normalizer==3.3.2
Django==4.2.11
docker==7.0.0
idna==3.6
packaging==24.0
pywin32==306
requests==2.31.0
sqlparse==0.4.4
typing_extensions==4.10.0
tzdata==2024.1
urllib3==2.2.1

More info:

after running pip show pywin32 got the following version: Name: pywin32 Version: 306

Solution

  • Explanation

    python:3 base image is a docker image based on debian:12, a linux distribution.

    pywin32 on the other hand has only Windows releases, which makes a lot of sense for it being a package with the description "Python for Win32 extensions".

    Hence you get the error ERROR: No matching distribution found. The architectures are incompatible.

    Solutions

    As for what to do for this, these are basically your options.

    1. Do you really need the package? If not, remove it.

    2. Are you building something that is cross-platform and uses pywin32 only conditionally? Use

    pywin32==306; platform_system=="Windows"

    See also Is there a way to have a conditional requirements.txt file for my Python application based on platform? for other options.

    1. Are you building something that needs to run on windows? Don't use a linux container.