TylerTaylor/Intro-to-Flask-082123

Intro to Flask

Flask Overview

• Python framework used to build web applications
• Easy to extend core functionality (Flask-SQLAlchemy for example)

Setup

1. Run pipenv install && pipenv shell
2. Import flask, in server/app.py:

from flask import Flask

3. Create an instance of the Flask class, named app:

# server/app.py
from flask import Flask

app = Flask(__name__)

4. Configure app.py to run as a script, and set debug mode to True which will allow us to see our changes without restarting the server:

from flask import Flask

app = Flask(__name__)

# Routes here

if __name__ == '__main__':
    app.run(port=5555, debug=True)

5. Create some routes

6. Run the app one of two ways:

   • python server/app.py to run it as a script (with debug mode)
   • flask run to run it through flask - if you go this route make sure to configure the environment variables:

     export FLASK_APP=app.py
     export FLASK_RUN_PORT=5555
     
     cd server
     flask run