This setup provides robust data integrity and excellent IDE support, including autocomplete and type checking. Project Structure and Organization As applications grow, maintaining a single file becomes impractical.
FastAPI Quickstart Install Uvicorn
from pydantic import BaseModel class Item(BaseModel): name: str description: str = None price: float tax: float = None @app. The framework handles the conversion of the URL segment into an integer, ensuring type safety and preventing common parsing errors.
The fastapi package contains the core framework, while uvicorn provides the production-ready server gateway interface. post("/items/") def create_item(item: Item): return item.
FastAPI Quickstart Install Uvicorn
The framework automatically generates interactive documentation through Swagger UI and ReDoc, streamlining the API exploration process for both developers and testers. The example above creates a root endpoint that responds to GET requests with a simple JSON object.
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