Code forHow to Create a RESTful API with Flask in Python Tutorial

app.py

from flask import Flaskfrom flask_restful import Apifrom models import dbimport configfrom resources import TaskList# Create the Flask application and the Flask-RESTful API manager.app = Flask(__name__)app.config.from_object(config)# Initialize the Flask-SQLAlchemy object.db.init_app(app)# Create the Flask-RESTful API manager.api = Api(app)# Create the endpoints.api.add_resource(TaskList, '/tasks')if __name__ == '__main__':    # Create the database tables.    with app.app_context():        db.create_all()    # Start the Flask development web server.    app.run(debug=True)

resources.py

from flask_restful import Resourcefrom flask import requestfrom models import Task, dbclass TaskList(Resource):    def get(self):        # Get all the tasks from the database.        tasks = Task.query.all()        # Convert the tasks to JSON and return a response.        task_list = [{'id': task.id, 'description': task.description} for task in tasks]        return {'tasks': task_list}    def post(self):        # Get the JSON data from the request.        task_data = request.get_json()        # Check if the data is valid.        if not task_data:            return {'message': 'No input data provided'}, 400        description = task_data.get('description')        if not description:            return {'message': 'Description is required'}, 400        # Add the task to the database.        new_task = Task(description=description)        db.session.add(new_task)        # Commit the task to the database.        db.session.commit()        # Return a message to the user.        return {'message': 'Task added', 'task': {'id': new_task.id, 'description': new_task.description}}

models.py

from flask_sqlalchemy import SQLAlchemydb = SQLAlchemy()class Task(db.Model):    id = db.Column(db.Integer, primary_key=True)    description = db.Column(db.String(200), nullable=False) # nullable=False means that the column cannot be empty    def __repr__(self):        # This method is used to print the object.        return f'Task {self.id}: {self.description}'

config.py

SQLALCHEMY_DATABASE_URI = 'sqlite:///tasks.db'

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