python: notebook installation and use

usefulness

The biggest advantage of notebook is the perfect combination: code run + markdown document.

installation

Install anaconda, comes with notebook application

Open notebook

Personal development environment: windows + vscode Enter
at the command line:, jupyter notebookyou can open the notebook in the default browser.

Common shortcut keys

Command mode (command mode)
in Edit mode, press Esc to enter command mode

hot key	effect	hot key	effect
A	insert cell above	B	insert cell below
D+D	delete cell	AND	to code
ctrl+enter	run select cell	M	to markdown
X	cut select cells	C	copy select cells
V	paste cells below	WITH	undo cell deletion

Edit mode (edit mode)
Click the cell area and press shift to enter the edit mode (markdown or code)
Note: If it is a code cell, click the code area to enter edit mode

hot key	effect	hot key	effect
Ctrl+Enter	Run the selected code block	Shift+Enter	Run the code block, select the following code block
Alt + Enter	Run the selected code block and insert a new unit below	Tab	Code completion, indentation

Plug-in installation

Install Jupyter Notebook extensions
conda install -c conda-forge jupyter_contrib_nbextensions
Note: Possible error: ModuleNotFoundError: No module named 'jupyter_contrib_core'
Solution:
Install jupyter_contrib_core: pip install jupyter_contrib_core
then install extensions:conda install -c conda-forge jupyter_contrib_nbextensions

Several useful plugins

1. markdown directory
   Table of Contents (2)
2. Display space variables
   Variable Inspector
3. Hide code input, only show result
   Hide input all

tips

1. Change the default directory when the notebook is opened

Everything searches the jupyter_notebook_config.py file; open the file, find c.NotebookApp.notebook_dir = 'E:\\major\\python'this line, and modify the directory.