Day 54 Goals: what you will make by the end of the day

• Full Stack = Front-End + Back-End
• Backend framework: Flask (is for small project) or Django (is for commercial large project)
• Client - - - Server - - - Database
  • Client is user terminal device edge for request information to server side and display result for view
  • Server is for receive request from client and get data from database and then return processed data back to user terminal
  • Database: store data
• Understand Python decorator, First-Class-Object

Understanding Backend web development with Python

• Flask application

• Flask 2.2.2

Flask

• Run command to install Flask

#Pip install Flask library as below command in Dos terminal
pip install -U Flask

Create your First web server with Flask

• Simple Flask App code

• Flask command

  • option1:

  flask --app main.py run
  

  • option2:

  #Linux OS is to use export command to setup environment variable
  export FLASK_APP=main.py
  python -m flask run
  

• Open web browser and run http://127.0.0.1:5000 by default

• Test run via web scraping