FastAPI is a modern, high-performance Python web framework for building APIs, rapidly gaining adoption due to its speed and ease of use.
FastAPI leverages open standards like OpenAPI and JSON Schema, using standard Python type hints to power its core features.
Define API endpoints using function decorators and declare path and query parameters directly in the function signature with type hints.
FastAPI automatically generates an interactive API documentation UI (Swagger UI) from your code at the `/docs` endpoint.
Use Pydantic's `BaseModel` to define the structure of a JSON request body, which FastAPI then uses for validation and documentation.
An endpoint can simultaneously accept a JSON request body along with path and query parameters by declaring them all in the function signature.
Declare complex data structures, like a list of JSON objects, using standard Python types like `List` for automatic validation and serialization.
When incoming data is invalid, FastAPI automatically rejects the request and returns a detailed JSON response pinpointing the exact location of each error.
Because FastAPI uses standard type hints, editors provide full autocompletion and inline type error checking, even for complex data structures.
FastAPI is one of the fastest Python frameworks, achieving performance comparable to Go by leveraging `asyncio` and high-performance libraries like `uvloop`.
FastAPI includes a powerful dependency injection system, security utilities for OAuth2, WebSocket support, background tasks, and more.
The creator discusses running FastAPI in serverless environments, the nature of its GitHub issues, and how the framework adapts to changes in Python.
A discussion on recommended IDEs, disabling documentation, and how FastAPI compares to frameworks like Flask, Django, and NestJS.
The framework's design is rooted in great developer experience and learning from prior art, with future plans to adopt new Python features like `Annotated`.
23:10Ashmi Banerjee
59:07Shweta Palande
47:11Teri Eyenike
27:11Eli Holderness
33:44Fabian Schindler
58:28Meredydd Luff
28:16Alexis Yushin
42:08Matteo Collina
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