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I installed in a local environment in anaconda (JupyterLab) the package kneed with the command conda install -c conda-forge kneed . Previously I installed in the same environment the packages jupyter,kneed, matplotlib, numpy, pandas ,seaborn, scikit-learn . While importing these modules in a jupyter notebook I get an error message saying that kneed is not installed:

ModuleNotFoundError: No module named 'kneed'
I have Python 3.9.7 installed.
To the contrary, when I check on the command line within the environment the same commands I have no problem. It seems as if Jupyter notebook is missing the information of the new installation of kneed.
Do you have any suggestion ? Many thanks.
                Thanks. I forgot to say that I already tried this, !pip install --upgrade kneed. It did not make any difference.
– user249018
                Apr 2, 2022 at 16:55
                DO you start anaconda prompt with run as administrator? I don't know this work for your problem but when I can't install package, this way works.
– Zeinab Mardi
                Apr 2, 2022 at 17:09
                Please read carefully this document: docs.anaconda.com/anaconda/install/verify-install. if you works with  Windows: Click Start, search, then select Anaconda Prompt from the menu and right click on and select Run as  administrator when open anaconda prompt  type: conda install -c conda-forge kneed then enter.
– Zeinab Mardi
                Apr 2, 2022 at 17:39
                Since you've tried other stuff, it wouldn't hurt to try in a cell in your notebook %conda install -c conda-forge kneed. And then try the import again to see if it worked. If it didn't work, then try in a cell in your notebook %pip install kneed. Please read about using the modern magics here. You no longer want to use an exclamation point with pip or conda when using them in a notebook. The newer, modern magics are more reliable.
– Wayne
                Apr 3, 2022 at 3:08
        
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