安裝nbextensions可提高jupyter notebook效率，安裝步驟如下：
1、pip 方式安裝：
(gluon) [root@localhost ~]# pip install jupyter_contrib_nbextensions
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting jupyter_contrib_nbextensions
Downloading https://pypi.tuna.tsinghua.edu.cn/packages/33/f0/6e2c00afda860f655fbf0f795f7310bdbf12122846344dfdc803fc7455d5/jupyter_contrib_nbextensions-0.5.1-py2.py3-none-any.whl (20.9MB)
...
2、安裝關聯的 JavaScript 和 CSS 文件：安裝關聯的 JavaScript 和 CSS 文件：
(gluon) [root@localhost ~]# jupyter contrib nbextension install
...
[I 22:29:28 InstallContribNbextensionsApp] Installing jupyter_contrib_nbextensions items to config in /usr/local/etc/jupyter
Enabling: jupyter_nbextensions_configurator
- Writing config: /usr/local/etc/jupyter
- Validating...
jupyter_nbextensions_configurator 0.4.1 OK
Enabling notebook nbextension nbextensions_configurator/config_menu/main...
Enabling tree nbextension nbextensions_configurator/tree_tab/main...
[I 22:29:28 InstallContribNbextensionsApp] Enabling notebook extension contrib_nbextensions_help_item/main...
[I 22:29:28 InstallContribNbextensionsApp] - Validating: OK
[I 22:29:28 InstallContribNbextensionsApp] - Editing config: /usr/local/etc/jupyter/jupyter_nbconvert_config.json
[I 22:29:28 InstallContribNbextensionsApp] -- Configuring nbconvert template path
[I 22:29:28 InstallContribNbextensionsApp] -- Configuring nbconvert preprocessors
[I 22:29:28 InstallContribNbextensionsApp] - Writing config: /usr/local/etc/jupyter/jupyter_nbconvert_config.json
[I 22:29:28 InstallContribNbextensionsApp] -- Writing updated config file /usr/local/etc/jupyter/jupyter_nbconvert_config.json
3、重啟jupyter notebook服務
4、在瀏覽器訪問jupyter notebook 即可看到nbextensions標簽
5、使用：（以Code prettify為例，Code prettify是代碼規范化擴展工具，其支持程序為yapf）
（1）在nbextensions標簽頁面勾選Code prettify，勾選后，在jupyter note頁面工具欄可看到新增一個小錘樣圖標。
（2）安裝擴展所需插件程序（這一步不一定是必須的，上一步的勾選完成后，系統應能自動下載和配置相關需求擴展程序。若出現錯誤，根據提示進行安裝）：
(gluon) [root@localhost ~]# pip install yapf
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting yapf
Downloading https://pypi.tuna.tsinghua.edu.cn/packages/7c/21/534d143afd3df9cae9b21674fcc32207cb80cfb3de56b89ef7a37c746cca/yapf-0.29.0-py2.py3-none-any.whl (185kB)
|████████████████████████████████| 194kB 353kB/s
Installing collected packages: yapf
Successfully installed yapf-0.29.0
（3）使用：選中一個cell，點擊該小錘樣圖標，即可看到代碼被規范化。若先按下Shift鍵不放，再點擊該小錘樣圖標，則該頁面所有cell的代碼都全部被規范化。
快捷鍵：Ctrl + L （規范化一個cell內代碼）；Ctrl + Shift + L (規范化全部cell內的代碼）
相關參考：《推薦Variable Inspector | DeBug工具PySnooper | 暗色系個性化》https://blog.csdn.net/Suexy_/article/details/102516961