add restful api flask tutorial

Author: x4nth055

README.md

@@ -245,6 +245,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
     - [How to Build a Web Assistant Using Django and OpenAI GPT-3.5 API in Python](https://www.thepythoncode.com/article/web-assistant-django-with-gpt3-api-python). ([code](web-programming/webassistant))
     - [How to Make an Accounting App with Django in Python](https://www.thepythoncode.com/article/make-an-accounting-app-with-django-in-python). ([code](web-programming/accounting-app))
     - [How to Build a News Site API with Django Rest Framework in Python](https://www.thepythoncode.com/article/a-news-site-api-with-django-python). ([code](web-programming/news_project))
+    - [How to Create a RESTful API with Flask in Python](https://www.thepythoncode.com/article/create-a-restful-api-with-flask-in-python). ([code](web-programming/restful-api-flask))
 
 - ### [GUI Programming](https://www.thepythoncode.com/topic/gui-programming)
     - [How to Make a Text Editor using Tkinter in Python](https://www.thepythoncode.com/article/text-editor-using-tkinter-python). ([code](gui-programming/text-editor))

web-programming/restful-api-flask/README.md

@@ -0,0 +1 @@
+# [How to Create a RESTful API with Flask in Python](https://www.thepythoncode.com/article/create-a-restful-api-with-flask-in-python)

web-programming/restful-api-flask/app.py

@@ -0,0 +1,22 @@
+from flask import Flask
+from flask_restful import Api
+from models import db
+import config
+from 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)

web-programming/restful-api-flask/config.py

@@ -0,0 +1 @@
+SQLALCHEMY_DATABASE_URI = 'sqlite:///tasks.db'

web-programming/restful-api-flask/models.py

@@ -0,0 +1,11 @@
+from flask_sqlalchemy import SQLAlchemy
+
+db = 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}'

web-programming/restful-api-flask/requirements.txt

@@ -0,0 +1,3 @@
+Flask
+Flask-RESTful
+Flask-SQLAlchemy

web-programming/restful-api-flask/resources.py

@@ -0,0 +1,29 @@
+from flask_restful import Resource
+from flask import request
+from models import Task, db
+
+class 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}}
+