How to install numpy / pandas

[DrVanScott]

Hi,

can you please give some advise how to use your image and in addition also install numpy / pandas?

BTW, i 've read lots of statements saying that alpine is not the best choice for python based applications, e.g. because auf alpine's musl which is not supported by "standard wheel"...

[UltimateDogg]

I am not sure the use case of running numpy and pandas in a docker container used for running tests, but regardless you can just use this image as a base and do a pip install. Something like

RUN pip3 install \
    --no-cache-dir \
    numpy \
    pandas \

I agree that alpine may not be best for heavily C based python packages but the intention is not to do a lot of non-testing C work in this docker image so i think the size advantage helps tests run faster.

[DrVanScott]

We use robotframework-datadriver[XLS] and this in turn has dependencies to these packages...

Unfortunately your idea does not work, even if i previously again install all those dependencies which are temporarily available when building your image. (gcc, make ...):

...
Successfully built numpy
Failed to build pandas
ERROR: Could not build wheels for pandas which use PEP 517 and cannot be installed directly

[UltimateDogg]

would need something like this:

RUN apk update \
  && apk --no-cache --virtual .build-deps add \
    gcc \
    libffi-dev \
    linux-headers \
    make \
    musl-dev \
    openssl-dev \
    which \
    wget \
# Install Robot Framework and Selenium Library
  && pip3 install \
    --no-cache-dir \
    numpy \
    pandas \
  && apk del --no-cache --update-cache .build-deps

[DrVanScott]

Hi thanks for your reply. Maybe i was a bit unclear, but your last suggestion was exactly what i have done and which still fails with the error message i posted in my previous comment.

But now i found that it was package "g++" which is additionally missing. Thanks for helping

[UltimateDogg]

Sure glad it worked, if you dont mind can you paste waht you did? It might be worth adding data driven test cases ability to the main image

[DrVanScott]

Sure ;-) Both following builds take aprox. 20 minutes each

For numpy/pandas only:

FROM ppodgorsek/robot-framework:latest

USER root

## # Install system dependencies
RUN apk update \
  && apk --no-cache --virtual .build-deps add \
    gcc \
    g++ \
    libffi-dev \
    linux-headers \
    make \
    musl-dev \
    openssl-dev \
    which \
    wget \
    && \
# Install Robot Framework and Selenium Library
  pip3 install \
    --no-cache-dir \
    numpy \
    pandas \
  && apk del --no-cache --update-cache .build-deps

USER ${ROBOT_UID}:${ROBOT_GID}

for robotframework-datadriver[XLS] (and numpy/pandas via dependencies)

FROM ppodgorsek/robot-framework:latest

USER root

## # Install system dependencies
RUN apk update \
  && apk --no-cache --virtual .build-deps add \
    gcc \
    g++ \
    libffi-dev \
    linux-headers \
    make \
    musl-dev \
    openssl-dev \
    which \
    wget \
    && \
# Install Robot Framework and Selenium Library
  pip3 install \
    --no-cache-dir \
    robotframework-datadriver[XLS] \
  && apk del --no-cache --update-cache .build-deps

USER ${ROBOT_UID}:${ROBOT_GID}