计算机英语讲课笔记11（Play with Flask）

1. Flask’s Documentation

• https://flask.palletsprojects.com/en/2.1.x/
  

2. Installation of Flask

• https://flask.palletsprojects.com/en/2.1.x/installation/
  
• We recommend using the latest version of Python. The current version of Python is 3.10.5
  
• Flask supports Python 3.7 and newer.
• Check the version of Python on your computer.
  
• It shows that Flask can be used on your computer.

(1) Create an environment

• Look at the instruction in the document.
  
• Let’s view the directory structure of the project - flaskdemo
  

(2) Activate the environment

• Look at the instruction in the document.
  
• We follow the instruction above.
  
• Type the command and then press the Enter key
  

(3) Install Flask

• Look at the instruction in the document.
  
• We follow the instruction above.
  
• Upgrade pip from 19.2.3 to 22.1.2
  

3. Quick Start - 快速起步

• https://flask.palletsprojects.com/en/2.1.x/quickstart/
  

(1) A Minimal Application

• Use PyCharm to open the flask project - flaskdemo
  
• Create a Python file named main.py
  
• Write the code in the main.py
  
• Run the program and look at the result.
  
• Visit http://localhost:8888 in the browser.
  

(2) Create and Visit a Template

• Create a template named welcome.html
  
• Modify the main.py to create a new router function named welcome.
  
• Run the program again and visit http://localhost:8888/welcome in the browser.