jupyter notebook 添加扩展

在jupyter notebook所安装的环境下，用conda安装Nbextensions ：

conda install -c conda-forge jupyter_contrib_nbextensions 
conda install -c conda-forge jupyter_nbextensions_configurator
jupyter contrib nbextension install --user

或者，
在jupyter notebook所安装的环境下，用pip(或pip3)安装Nbextensions ：

pip install jupyter_contrib_nbextensions
pip install jupyter_nbextensions_configurator
jupyter contrib nbextension install --user 
jupyter nbextensions_configurator enable --user

接着打开jupyter notebook，就可以看见主页多了一个Nbextentions标签：