Setup problems when pip not available

[jklebes]

Thanks for the plugin,
I tried in a clean ubuntu docker container. Root installed python3 and pip. As non-root user, I set up vundle and add the plugin.
On opening a .f90 file with vim as non-root user, I get the message about installing python dependencies. If selecting yes, I get the errors for each one

Installing fortls
:!pip3 install fortran-language-server --user -q
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.

shell returned 1

It seems to be default now that use of pip is discouraged and disabled https://stackoverflow.com/questions/75608323/how-do-i-solve-error-externally-managed-environment-every-time-i-use-pip-3 . I have the same situation on my personal laptop and university network.
Of course, I can change the setting to 3 in vimrc as hinted and not get these functionalities. Just letting you know that this might not be working for many users, maybe we can have an alternative install route.