Manual installation
Enter these command lines in your terminal:
1 pip3 install jupyter-tabnine --user
2 jupyter nbextension install --py jupyter_tabnine --user
3 jupyter nbextension enable --py jupyter_tabnine --user
4 jupyter serverextension enable --py jupyter_tabnine --user
The command line doesn't run when printed in a jupyter cell.
You need to run the installation pip command in your machine terminal.