Install nbextensions

pip install jupyter_contrib_nbextensions -i https://pypi.mirrors.ustc.edu.cn/simple
jupyter contrib nbextension install --user
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Install nbextensions_configurator

pip install --user jupyter_nbextensions_configurator 
jupyter nbextensions_configurator enable --user
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use

Restart Jupyter, and on the main page that appears, you can see that the Nbextensions TAB is added. In this page, check Hinterland to enable code autocomplete