Ubuntu 20.04 upgrade, Python missing libffi.so.6

Question

I recently upgraded my OS to Ubuntu 20.04 LTS.

Now when I try to import a library like Numpy in Python, I get the following error:

ImportError: libffi.so.6         


        

Answer 1

I had the same problem (when I upgrded to Ubuntu 20.04) when I tried to run Jupyter Notebook.

Step 1) --> Just re-install python3.7.6 (the version I was using) :

$ cd path_to_python3.7_folder

• Do again de installation process:

    $ ./configure --enable-optimizations
    $ make
    $ sudo make install

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2. Step 2: uninstall jupyter. I used pip3.7 uninstall ... See: How to uninstall Jupyter note book installed by pip3

3. Step 3: Re-install jupyter again:

    $ pip3.7 install jupyterlab
    $ pip3.7 install notebook

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Try to run jupyter again. It should work.