Flask Has a Free Micro-Framework That Lets You Build Python APIs in 10 Lines

Flask is a lightweight Python web framework. It gives you routing, templating, and a dev server — then gets out of your way.

What You Get for Free

• Minimal core — only what you need
• Jinja2 templates — powerful template engine
• Werkzeug — robust WSGI toolkit underneath
• Extensions — Flask-SQLAlchemy, Flask-Login, Flask-CORS
• Blueprints — modular application components

Hello World API

from flask import Flask, jsonify

app = Flask(__name__)

@app.route('/api/hello')
def hello():
    return jsonify({'message': 'Hello World'})

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

Flask vs Django

Feature	Flask	Django
Philosophy	Micro	Batteries-included
Learning curve	Lower	Higher
Admin panel	No (add-on)	Built-in
Best for	APIs, microservices	Full web apps

Tips

1. Use Flask-RESTful or Flask-RESTX for REST APIs
2. Use Gunicorn for production (not built-in server)
3. Structure with Blueprints from day one

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Need Python API development? Check my work on GitHub or email [e-mail] for consulting.