Introduction to jupyter notebook

One 、Jupyter Notebook Has rapidly become a data analysis , machine learning Required tools for . Because it allows data analysts to focus on explaining the entire analysis process to users .

Jupyter notebook（http://jupyter.org/） It's a kind of Web application , It allows the user to translate the description text 、 Mathematical equation 、 Code and visualization are all combined into one document that is easy to share .

• The name comes from Julia、Python and R（ Three open source languages for data science ）
• Is a programmer and scientific workers programming / file / note / Display the software
• .ipynb The file format is used for computational narration JSON Formal specification of document format

 

Two 、 start-up Jupyter Notebook

    First installation  Jupyter  The easiest way to do this is to use Anaconda. This release comes with Jupyter notebook. You can use... By default notebook. Make sure you have installed Anaconda.

 

Anaconda https://www.anaconda.com/products/individual Or download directly from the official website

  It is also an integrated software , Because I can see Process operation results , Do data analysis pycharm More friendly . Hope to be independent from the original , Optional installation .

 

  3、 ... and 、 Quick start notebook

 1、 Directly click

Auto start page

 

 

2. newly build notebook file

• notebook The document format is .ipynb

 

 3. Content interface operation

    The title bar ： Click on the title （ Such as Untitled） Modify the document name ( top left corner )

  You can modify the name

4. cell operation

cell： a pair In Out A session is considered a unit of code , be called cell

cell In front of the line number * , Indicates that the code is running

 

Jupyter Two modes are supported ：

Edit mode （Enter）
    Enter in command mode Enter Or double-click cell Enter edit mode
    Can operate cell Inner text or code , shear ／ Copy ／ Paste move and so on
Command mode （Esc）
    Press Esc Exit the editor , Enter command mode
      Can operate cell The unit itself cuts ／ Copy ／ Paste ／ Moving and so on

5. The mouse operation

6. close notebook file  

 

 7、 Upload notebook file

    

 8、 Share your notebook

single click File->Download as, You can choose many formats to download your notebook. Generally, I will choose different download formats according to the following purposes ：

1） If I want to share my data analysis results with customers , I will choose to notebook Download as HTML file .

2） If I want to embed my data analysis results and code into the project , For example, make a data analysis sub module for the pharmacy management system , I will choose Python（.py） modular , This can integrate my code into the project , Become a sub module , It is convenient to complete tasks with other developers .

3） If you want to use it in blogs or documents notebook, I will choose Markdown Format .

4） default notebook The file suffix is .ipynb

9、  close Jupler notebook The server

Directly close and open notebook The page of . Once again remind , This will immediately shut down all running notebook, therefore , Please make sure you save your work ！

close notebook After the server , Open it again next time notebook, When you continue in this notebook When writing code in , It is found that the previous variables cannot be accessed . Need you in this notebook Of Kernerl Tab “Run All” Recompile the previous code .

10、 Shortcut operation
    Two modes universal shortcut keys

   Shift+Enter, Execute the code in this unit , And jump to the next unit
   Ctrl+Enter, Execute the code in this unit , Stay in this unit
Command mode ： Press ESC Get into

Y,cell Switch to Code Pattern

M,cell Switch to Markdown Pattern

A, At present cell To the top of cell

B, At present cell add cell

other ( understand )

double-click D： Delete the current cell

Z, Back off

L, For the current cell Add a line number <!–

Ctrl+Shift+P, Dialog box input command directly run

Quick jump to the first one cell,Crtl+Home

Quick jump to the last one cell,Crtl+End -->

Edit mode ： Press Enter Get into

The completion code ： Variable 、 Methods the heel Tab key

Add for one or more lines of code / uncomment ：Ctrl+/（Mac:CMD+/）

other ( understand )：

Multiple cursor operation ：Ctrl Click the mouse （Mac:CMD+ The click of a mouse ）
Back off ：Ctrl+Z（Mac:CMD+Z）
redo ：Ctrl+Y（Mac:CMD+Y)

Four 、 Jupyter Notebook Automatic completion of code related functions

install ：

pip install jupyter_contrib_nbextensions

function

jupyter contrib nbextension install --user --skip-running-check 

Open your jupyter notebook, You'll find out , There is an extra column above the menu bar Nbextension, Check the extension function you want in there .

  Select the following ：

  effect ：