Flask Setup & App Factory
Install Flask, create an app, run development server
Knowledge Debt detected
You can study this freely — but your score may plateau if these foundations have gaps. The Mastery badge requires them to be solid.
Explanation
Flask is a for Python. "Micro" means it gives you the basics (routing, request/response) and lets you add what you need.
from flask import Flask
app = Flask(__name__)
@app.route("/")
def index():
return "Hello, World!"
if __name__ == "__main__":
app.run(debug=True)Run with: python app.py → opens at http://127.0.0.1:5000
Best practice — :app-factory[A function that creates and configures the Flask application instance, enabling testing and multiple configurations]:
python def create_app(): app = Flask(__name__) app.config.from_object("config.DevelopmentConfig") # register blueprints, extensions... return app
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Next in Flask
Flask Routing