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3: Virtual Environments (venv)

  • Page ID
    474525
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    Creating venv

    With the release of Debian 12 (Bookworm) third party packages can no longer be installed in the system level python installation and must be installed in a virtual environment. This tutorial will go over how to do this.  First you need to be sure the venv module is installed.  Run the following code and it will let you know if it is already installed, or give you the option to install it.

    sudo apt install python3-venv
    

    Now create a folder for your virtual environment, we will call it my_venv for my virtual environment (you can call it anything you want, and many programs call the folder venv, as that helps you recognize what it is).  Note, this may take a few seconds.  Be sure you are in the directory you want to be in when you do this.

    python3 -m venv my_venv
    

    If you want to see what is in it type

    ls my_venv
    

    clipboard_e7f3f9d9034a056c7d93c38f3db5750f4.png

    and you will see the pyvenv.cfg file along with several folders.

    To activate use the following code

    source my_venv/bin/activate
    

    clipboard_e69176bc6e5a66be16eda67a83143ae34.png

    You will not that (my_venv) is now in front of the prompt

    Now you can install packages in your virtual environment.  for example, if you want to install gpio zero type

    clipboard_ef5fd228442e1dd9d9786d17fcb2ad7af.png

    pip install gpiozero
    

     

    To deactivate the virtual environment simple type deactivate.  Note, that is not a linux command, but a shell function.

    deactivate
    

    clipboard_e05e78f94579828cf461f122d4fdfedf8.png

    Note, if you want to reactivate the virtual environment from your home directory you need to give the source-activate command a path to the bin folder

    clipboard_e234b7e71f63d0c32d5d9eb35006174f8.png

    now you see (my_venv) in front of the prompt

     

    Thonny and venv

    You now need to set up Thonny to use the python interpreter in the virtual environment

    Go to Tools/Options/interpreter.  If the virtual environment does not show in the dropdown box, click the three dots to the right of the dropdown arrow

    clipboard_ee31f911ee3bdb62ba5ebfd7acf4f9746.pngFigure \(\PageIndex{1}\): If you do not see your venv click the three dots to the left of the dropdown arrow. (Belford cc0.0)

    Now  navigate to the bin directory of your venv and pick the python interpreter you want to run

    clipboard_e79d0d30d0333fb16a7b865faf240140e.pngFigure \(\PageIndex{2}\): Pick the version of python you want to run. (Copyright; author via source)

     

     

     


    3: Virtual Environments (venv) is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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