⚡ Live Sandbox: AI Dev Tool: FastAPI Pydantic v2 (jbw8)

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```python
# AI Dev Tool: Cloudflare Worker Hono API Template with FastAPI and Pydantic v2
# Description: A production-ready starter boilerplate for building micro-SaaS applications
# using Cloudflare Workers, Hono, FastAPI, and Pydantic v2.

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from typing import Optional
import json
import os

# Define the FastAPI application
app = FastAPI()

# Define a Pydantic model for the API request body
class Item(BaseModel):
    """Item model for the API request body"""
    name: str
    description: Optional[str] = None

# Define a Cloudflare Worker using Hono
class HonoWorker:
    """Hono Cloudflare Worker"""
    def __init__(self):
        self.items = {}

async def handle_request(self, request):
        """Handle incoming requests"""
        try:
            # Parse the request body
            item = Item.parse_obj(await request.json())
            # Store the item in the in-memory database
            self.items[item.name] = item
            # Return a success response
            return {"message": "Item created successfully"}
        except Exception as e:

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