Jupyter Notebook安装jupyter_contrib_nbextension扩展功能后不显示Nbextensions标签的解决办法 - xd21303/Notebook GitHub Wiki

conda install -c conda-forge jupyter_nbextensions_configurator
conda install -c conda-forge jupyter_contrib_nbextensions

这个命令很重要

jupyter contrib nbextension install --user

https://github.com/ipython-contrib/jupyter_contrib_nbextensions/blob/master/README.md