Implementing REST API Service Using Flask

Below is an example of implementing a simple REST API service using Flask, including basic CRUD operations for a collection of tasks.


from flask import Flask, jsonify, request

app = Flask(__name__)

tasks = [
    {
        'id': 1,
        'title': 'Learn Python',
        'done': False
    },
    {
        'id': 2,
        'title': 'Build REST API',
        'done': False
    }
]

@app.route('/tasks', methods=['GET'])
def get_tasks():
    return jsonify({'tasks': tasks})

@app.route('/tasks/', methods=['GET'])
def get_task(task_id):
    task = next((task for task in tasks if task['id'] == task_id), None)
    if task:
        return jsonify({'task': task})
    else:
        return jsonify({'error': 'Task not found'}), 404

@app.route('/tasks', methods=['POST'])
def create_task():
    if not request.json or 'title' not in request.json:
        return jsonify({'error': 'Title is required'}), 400

    task = {
        'id': len(tasks) + 1,
        'title': request.json['title'],
        'done': False
    }
    tasks.append(task)
    return jsonify({'task': task}), 201

@app.route('/tasks/', methods=['PUT'])
def update_task(task_id):
    task = next((task for task in tasks if task['id'] == task_id), None)
    if not task:
        return jsonify({'error': 'Task not found'}), 404

    if 'title' in request.json:
        task['title'] = request.json['title']
    if 'done' in request.json:
        task['done'] = request.json['done']

    return jsonify({'task': task})

@app.route('/tasks/', methods=['DELETE'])
def delete_task(task_id):
    global tasks
    tasks = [task for task in tasks if task['id'] != task_id]
    return jsonify({'result': True})

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

To test the API, you can use tools like curl, Postman, or any HTTP client to interact with the endpoints: