How can I integrate Pydantic with FastAPI?

How can I integrate Pydantic with FastAPI?

You can integrate Pydantic with FastAPI by using Pydantic models to define your request and response data structures.

Can you show me a simple example?

Sure! Here's a basic example:

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()

class Item(BaseModel):
    name: str
    price: float

@app.post('/items/')
async def create_item(item: Item):
    return item

What if I want to add validation to the Pydantic model?

You can add validation by using Pydantic's built-in validators. For example:

class Item(BaseModel):
    name: str
    price: float
    quantity: int = Field(..., gt=0)  # quantity must be greater than 0