How do you build RESTful APIs with Python frameworks? Python frameworks से RESTful APIs कैसे बनाते हैं?

# Flask-RESTful
from flask import Flask
from flask_restful import Api, Resource, reqparse

app = Flask(__name__)
api = Api(app)

class TodoItem(Resource):
    def get(self, id):
        return {'id': id, 'task': 'Sample task'}
    
    def post(self, id):
        parser = reqparse.RequestParser()
        parser.add_argument('task', type=str, required=True)
        args = parser.parse_args()
        return {'id': id, 'task': args['task']}, 201
    
    def put(self, id):
        parser = reqparse.RequestParser()
        parser.add_argument('task', type=str)
        args = parser.parse_args()
        return {'id': id, 'task': args['task']}, 200
    
    def delete(self, id):
        return {'status': 'deleted', 'id': id}, 204

api.add_resource(TodoItem, '/todos/<int:id>')

# Django REST Framework
from rest_framework import viewsets
from rest_framework.decorators import action
from rest_framework.response import Response
from .models import Todo
from .serializers import TodoSerializer

class TodoViewSet(viewsets.ModelViewSet):
    queryset = Todo.objects.all()
    serializer_class = TodoSerializer
    
    @action(detail=False, methods=['get'])
    def recent(self, request):
        recent = Todo.objects.order_by('-created_at')[:5]
        serializer = self.get_serializer(recent, many=True)
        return Response(serializer.data)

# FastAPI with Pydantic
from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()

class TodoCreate(BaseModel):
    title: str
    description: str = None

class Todo(TodoCreate):
    id: int

todos_db = []

@app.get('/todos')
async def get_todos():
    return todos_db

@app.get('/todos/{todo_id}')
async def get_todo(todo_id: int):
    return next((t for t in todos_db if t['id'] == todo_id), None)

@app.post('/todos', response_model=Todo)
async def create_todo(todo: TodoCreate):
    new_todo = {'id': len(todos_db) + 1, **todo.dict()}
    todos_db.append(new_todo)
    return new_todo

@app.put('/todos/{todo_id}')
async def update_todo(todo_id: int, todo: TodoCreate):
    for t in todos_db:
        if t['id'] == todo_id:
            t.update(todo.dict())
            return t

@app.delete('/todos/{todo_id}')
async def delete_todo(todo_id: int):
    global todos_db
    todos_db = [t for t in todos_db if t['id'] != todo_id]
    return {'status': 'deleted'}