Using docker, instead of virtualenv

If you fancy a change, you just need a Dockerfile:

FROM python:3.7

RUN pip install pytest
COPY requirements.txt  .
RUN  pip3 install -r requirements.txt

and a pytest.ini, in the root (don’t ask):

pythonpath = .

Then you can build the image:

docker build -t foo .

And run the tests:

docker run -it --rm -v $PWD:/app -w /app foo pytest tests/

Or run the app locally, e.g. a lambda func:

docker run -it --rm -v $PWD:/app -w /app -e PGHOST=... -e PGUSER=... -e PGPASSWORD=... foo python -c 'import app;, None)'

Is it better? Probably not, you’re just swapping one set of problems for a different set 🤷

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