Learning points for Intro to Flask lecture

flask_demo.md

What we will do in this lecture

1. Set up Conda env

2. Install the necessary packages

   1. pip install flask
   2. pip freeze > requirements.txt

3. Set up Git repo

   1. git init + git remote add <url> OR
      1. This creates a LOCAL git repo, which you will LINK to a remote one (typically on GitHub)
   2. Create a repo on GitHub, git clone <remote url>
      1. This copies the folder onto your machine

4. Set up Flask app

   1. Create a new Flask instance

   2. Run app (with debugging)

      1. flask run vs python app.py

   3. Create route(s)

      1. @app.route('/route')

   4. Create HTML templates

      1. MUST be inside templates folder

   5. Use Jinja to write Python-like code in HTML

      1. {% extends "_layout.html" %}
      2. if-else, for, etc inside HTML
         1. {% if username == 'kevin' %} {% end if%}

   6. Dynamic routing (e.g., users/<username>)

      1. We did not predefine routes called users/kevin or users/blake

   7. Pass variables to HTML

   8. Static files

      1. For images and CSS as they do not interact with the server, unlike HTML
      2. MUST be inside a static folder