Python/venv

venv

# pip install pip --upgrade
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/python3.12/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.

venv

Create virtual environment:

python3 -m venv [project_name]

This will create a folder called "[project_name]"

To use the folder:

source [project_name]/bin/activate

Then pip install whatever you want

To deactivate the virtual env: (from within the virutalenv)

deactivate

Ref: [1]

virtualenv

Pretty much identical but called using "virtualenv" instead of module

pip install virtualenv

Create env:

virutalenv [project]

Create env with particular python:

virtualenv -p $(which python2) [project]

Activate:

source [project]/bin/activate

Deactivate:

deactivate

Ref: [2]