Question 209118 in Ubuntu Question posted in
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Ubuntu – Installing python-pip and python3-pip in Docker image

I need to build a Docker image with python2 and python3 with ubuntu as base. So I have added below commands to my Dockerfile to install python2 and python3. Along with those, I’m trying to install python-pip and python3-pip.

RUN apt-get install -y --no-install-recommends 
        python2 
        python-pip ; 
    apt-get install -y --no-install-recommends 
        python3 
        python3-pip ;

When I try to build the above Dockerfile, the python2, python-pip and python3 are installing successfully. But when python3-pip is installing, it is removing python-pip. Do we need both python-pip and python3-pip? If yes, how can I make the python3-pip to not remove python-pip package?

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2

Answers


  1. 0

    The issue you’re encountering is because the package python3-pip conflicts with the package python-pip in Ubuntu. By default, only one version of pip can be installed at a time.

    If you require both pip for Python 2 and pip for Python 3, you have a few options:

    Option 1: Use pip for Python 2 and pip3 for Python 3

    Install python-pip to get pip for Python 2.
    Install python3-pip to get pip3 for Python 3.
    Use pip for Python 2 commands and pip3 for Python 3 commands.
    Option 2: Use pip for Python 2 and pip for Python 3 with different installation locations

    Install python-pip to get pip for Python 2.
    Install python3-pip to get pip for Python 3, but specify a different installation location.
    Use pip for Python 2 commands and use the specific path to pip for Python 3 commands.
    Here’s an example of how you can modify your Dockerfile to implement Option 2:

    FROM ubuntu:latest

# Install Python 2 and pip for Python 2
RUN apt-get update && apt-get install -y --no-install-recommends 
        python2 
        python-pip

# Install Python 3 and pip for Python 3
RUN apt-get update && apt-get install -y --no-install-recommends 
        python3 
        python3-distutils 
        && python3 -m ensurepip 
        && rm -r /usr/lib/python*/ensurepip 
        && pip3 install --no-cache-dir --upgrade pip setuptools wheel

# Set up aliases for pip2 and pip3
RUN ln -s /usr/bin/pip /usr/bin/pip2

CMD ["/bin/bash"]

    With this setup, you can use pip2 for Python 2 commands and pip3 for Python 3 commands. Both pip versions are available without conflicting with each other.

    Please note that the above Dockerfile example assumes you’re using the latest version of Ubuntu as the base image. Adjust it according to your specific requirements.

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  2. 0 
    FROM ubuntu:latest

# Install Python 2 and pip for Python 2
RUN apt-get update && apt-get install -y --no-install-recommends 
        python2 
        python-pip

# Install Python 3 and pip for Python 3
RUN apt-get update && apt-get install -y --no-install-recommends 
        python3 
        python3-pip

# Set up aliases for pip2 and pip3
RUN ln -s /usr/bin/pip /usr/bin/pip2
RUN ln -s /usr/bin/pip3 /usr/bin/pip3

CMD ["/bin/bash"]

    With these modifications, your Docker image will have both Python 2 and Python 3 installed, along with their respective versions of pip. You can use pip for Python 2 commands and pip3 for Python 3 commands.

    Remember to adjust the Dockerfile according to your specific requirements, such as the base image or any additional packages you may need.

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