Cannot install program using pip3

Troubleshooting
1

Hi,
I’m trying to install a python program “pihole5-list-tool” using pip3, however this fails with error:

$ sudo pip3 install pihole5-list-tool --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/python3.11/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.

Could you please advise how to fix this?

THX

2

did you install anything else that use Python? Like HomeAssistant?

Theoretically something you could try

3

Pihole

4

And you installed Python from DietPi catalogue?

5

Actually not.
I installed these packages manually:
python3-pip
python3-setuptools
python3-wheel

But now I removed the packages again and installed from software catalog
Python 3: Runtime system, pip package installer and development headers.

Now installation of program pihole5-list-tool works, but I don’t understand what makes the difference.

6

probably a missing configuration on your first attempted.

7

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