Jupyter command `jupyter-lab` not found
Its the space. Its always the space. Never ever use spaces within package name. Its always either namepart1-namepart2 or namepart1namepart2. This is because arguments are separated by space. So if you put space in between, it makes pip think that you want to install two different packages named jupyter and lab. Just use:
python -m pip install jupyterlabOr simply:
pip install jupyterlabNo need to uninstall or reinstall anything. However to run jupyter lab server you might want to add spaces as follows:
jupyter lab
In my case, the only way to fix this was to add the following directory to the PATH in Linux:
/home/ubuntu/.local/bin
I had the same error on Windows 10. It was with pip install jupyterlab. Then after the error I uninstalled it with pip and reinstalled with "pip install jupyterlab". Everything worked flawlessly thereafter.
In your case you're using pip3. Try it as above or see if pip3 needs an update.