I have been suffering for installation of pymavlink. All the process being followed for installation of mavlink but when “python3 -m pip install -r pymavlink/requirements.txt”
is to run in command line in terminal it halts. I really need help on it I have to complete some task in mission planner by inserting codes from pymavlink but its not being installed.

I ran through cmds for installation of pymavlink in this way:
**sudo apt install python3 python3-pip
git clone https://github.com/mavlink/mavlink.git –recursive
python3 -m pip install -r pymavlink/requirements.txt
**
now the message its displaying is
first one:
python3 -m pip install –upgrade pymavlink
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.

and even if i try next way it displays
python3 -m pipx install –upgrade pymavlink
usage: /usr/bin/python3 -m pipx [-h] [–version]
{install,uninject,inject,upgrade,upgrade-all,uninstall,uninstall-all,reinstall,reinstall-all,list,run,runpip,ensurepath,environment,completions}
…
/usr/bin/python3 -m pipx: error: unrecognized arguments: –upgrade
root@pramiz:/home/pramiz/mavlink# python3 pip install pymavlink
python3: can’t open file ‘/home/pramiz/mavlink/pip’: [Errno 2] No such file or directory
root@pramiz:/home/pramiz/mavlink# python3 pipx install pymavlink
python3: can’t open file ‘/home/pramiz/mavlink/pipx’: [Errno 2] No such file or directory

**Note: Pip version in my OS is pip 23.2 **