Why Flask as a micro-framework - See It in Action

Why Flask as a micro-framework

📖 Scenario: You want to build a simple web app that shows a welcome message. You want to keep things easy and fast without extra features you don't need.

🎯 Goal: Build a minimal Flask app that shows a welcome message at the home page using Flask's simple micro-framework style.

📋 What You'll Learn

Create a Flask app instance named app

Define a route for the home page using @app.route('/')

Create a function home that returns the string 'Welcome to Flask!'

Run the app with app.run() at the end

💡 Why This Matters

🌍 Real World

Flask is great for small web apps or APIs where you want to keep things simple and fast without extra features.

💼 Career

Many jobs require building quick prototypes or small services, and Flask's micro-framework style helps you do that efficiently.

1

DATA SETUP: Import Flask and create app instance

Import Flask from the flask package and create a Flask app instance called app.

Flask

# Your code here

Need a hint?

Use from flask import Flask and then app = Flask(__name__).

2

CONFIGURATION: Define the home page route

Use the @app.route('/') decorator to define the home page route.

Flask

from flask import Flask
app = Flask(__name__)

# Your code here

Need a hint?

Use @app.route('/') just before the function that handles the home page.

3

CORE LOGIC: Create the home page function

Define a function called home that returns the string 'Welcome to Flask!'.

Flask

from flask import Flask
app = Flask(__name__)

@app.route('/')
# Your code here

Need a hint?

Write def home(): and inside it return 'Welcome to Flask!'.

4

COMPLETION: Run the Flask app

Add app.run() at the end to start the Flask app.

Flask

from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return 'Welcome to Flask!'

# Your code here

Need a hint?

Simply add app.run() at the end of your code to start the server.