python - Proper usage of pip from Docker -


i want install packages pip in container. trivial way following:

from ubuntu:trusty run apt-get update && \     apt-get install python-pip <lots-of-dependencies-needed-only-for-pip-install> run pip install <some-packages>

however, way install lot of unneeded dependencies, increases size of container unnecessarily.

my first idea this:

from ubuntu:trusty pip_install run apt-get update && \     apt-get install python-pip <lots-of-dependencies-needed-only-for-pip-install> run pip install <some-packages>  ubuntu:trusty run apt-get update && \     apt-get install python-pip <runtime-dependencies> copy --from=pip_install /usr/local/bin /usr/local/bin copy --from=pip_install /usr/local/lib/python2.7 /usr/local/lib/python2.7

this works, feels workaround. there more elegant way of doing this? thought of this:

from ubuntu:trusty pip_install run apt-get update && \     apt-get install python-pip <lots-of-dependencies-needed-only-for-pip-install> run pip install <some-packages> volume /usr/local  ubuntu:trusty <somehow mount /usr/local pip_install /tmp/pip> run apt-get update && \     apt-get install python-pip <runtime-dependencies> run pip install <from /tmp/pip> <some-packages>

is possible?

i have used of python images, in real application derive image derives ubuntu:trusty. question, it's beside point.


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