Question 249446 in Ubuntu Question posted in
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Ubuntu – how to install python packages under a virtual environment inside an docker image/container?

docker file (sample below) uses ubuntu as a base image, trying to install additional python packages, throws an warning/error, based on the warning, i can create a virtual environment and install all the required packages that i need.

to use this image/container , how do i make sure the virtual environment is activated , such that all the python packages are available, when script/program needs to run

or is there an alternative way to do the same.

Dockerfile

FROM ubuntu:23.10 

RUN apt-get update; apt-get -y install python3.11 python3-pip


RUN pip install pandas

warning/error

error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
    python3-xyz, where xyz is the package you are trying to
    install.

    If you wish to install a non-Debian-packaged Python package,
    create a virtual environment using python3 -m venv path/to/venv.
    Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
    sure you have python3-full installed.

    If you wish to install a non-Debian packaged Python application,
    it may be easiest to use pipx install xyz, which will manage a
    virtual environment for you. Make sure you have pipx installed.

    See /usr/share/doc/python3.11/README.venv for more information.

note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.
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2

Answers


  1. 0

    For whatever reason the container wants you to install pandas through apt package manager instead of through pip (python)

    It than tells you that if you want to install through pip you should use a virtualenv and so on. It tells you basically what you need to do in order to install through pip using a virtualenv.

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  2. 0

    One possible Dockerfile could look like this:

    FROM ubuntu:23.10

WORKDIR /app

RUN apt-get update; apt-get -y install python3.11 python3-pip python3.11-venv
RUN python3.11 -m venv .venv && /app/.venv/bin/python -m pip install pandas

    This creates virtual environment in /app/.venv and installs pandas there.

    To run scripts which use pandas module use /app/.venv/bin/python command.

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