# 安装
conda install jupyter 或者 pip install jupyter
# 打开jupyter notebook, 没有显示菜单
尝试下面这个方法，没有成功：
图片来源：https://blog.csdn.net/jerry99s/article/details/124730847
# Lastly，this method solve my problem：
https://www.cnblogs.com/daysme/p/9464459.html
conda install -c conda-forge jupyter_contrib_nbextensions # 安装扩展
jupyter nbextension enable codefolding/main # 启用扩展
jupyter notebook # 重启 jupyter
