from typing import Annotated
from pydantic import Field, BaseModel

# Annotated מאפשר לFastAPI ולPydantic להוסיף validation
class CreateUserRequest(BaseModel):
    name: Annotated[str, Field(min_length=2, max_length=50)]
    email: Annotated[str, Field(pattern=r"^[\w.+-]+@[\w-]+\.[a-z]{2,}$")]
    age: Annotated[int, Field(ge=18, le=120)]

# FastAPI משתמש ב-Annotated גם לQuery params
from fastapi import FastAPI, Query

app = FastAPI()

@app.get("/users")
async def list_users(
    page: Annotated[int, Query(ge=1, description="Page number")] = 1,
    limit: Annotated[int, Query(ge=1, le=100, description="Items per page")] = 20,
):
    return {"page": page, "limit": limit}

Type Hints ו-mypy — Static Typing ב-Python

Type Hints ו-mypy — Static Typing ב-Python