🍶 Flask

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# Application Factory Pattern
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_cors import CORS

db = SQLAlchemy()

def create_app(config_name='development'):
    app = Flask(__name__)
    app.config.from_object(config[config_name])
    
    # Initialize extensions
    db.init_app(app)
    CORS(app)
    
    # Register blueprints
    from .api import api_bp
    app.register_blueprint(api_bp, url_prefix='/api/v1')
    
    # Error handlers
    @app.errorhandler(404)
    def not_found(error):
        return {'error': 'Not found'}, 404
    
    return app

# Blueprint-based API
from flask import Blueprint, request, jsonify
from flask_restful import Api, Resource

api_bp = Blueprint('api', __name__)
api = Api(api_bp)

class DocumentResource(Resource):
    def get(self, doc_id):
        document = Document.query.get_or_404(doc_id)
        return document.to_dict()
    
    def put(self, doc_id):
        document = Document.query.get_or_404(doc_id)
        data = request.get_json()
        document.update(data)
        db.session.commit()
        return document.to_dict()

api.add_resource(DocumentResource, '/documents/<int:doc_id>')