1.安装该库的命令如下：
python -m pip install jupyter_contrib_nbextensions
2 然后执行：
jupyter contrib nbextension install --user --skip-running-check
3.在jupyter notebook的nbextensions菜单栏中勾选插件 ：
ps：如果遇到pip install 时报错：ERROR: Command errored out with exit status 1: python setup.py egg_inf
运行这段代码后继续重行运行就好
pip install --upgrade setuptools && python -m pip install --upgrade pip
