How to deal with Python’s requirements.txt while using a Docker development environment?

# Make sure all layers are based on the same python version.
FROM python:3.10-slim-buster as base

# The actual dev/test image.
# This is where you can install additional dev/test requirements.
FROM base as test
COPY ./requirements_test.txt /code/requirements_test.txt
RUN python -m pip install --no-cache-dir --upgrade -r /code/requirements_test.txt

ENTRYPOINT ["python"]
# Assuming you run tests using pytest.
CMD ["-m", "pytest", "..."]

# The actual production image.
FROM base as runtime
COPY ./requirements.txt /code/requirements.txt
RUN python -m pip install --no-cache-dir --upgrade -r /code/requirements.txt

ENTRYPOINT ["python"]
# Assuming you wantto run main.py as a script.
CMD ["/path/to/main.py"]

requests

-r requirements.txt

pytest

services:
  service:
    build:
      context: .
      dockerfile: ./Dockerfile
      target: runtime  # or test for running tests

# This requires to mount the file 'requirements_dev.txt' into the container - as a volume.
docker exec -it  python -m pip install --upgrade -r requirements_dev.txt

FROM AppBase:v1.2
...