FastAPI

Source: Wikipedia, the free encyclopedia.
FastAPI
Developer(s)Sebastián Ramírez
Initial releaseDecember 5, 2018; 5 years ago (2018-12-05)[1]
Stable release
0.115.0[2] Edit this on Wikidata / 17 September 2024; 18 days ago (17 September 2024)
Repositorygithub.com/tiangolo/fastapi
Written inPython
TypeWeb framework
LicenseMIT
Websitefastapi.tiangolo.com

FastAPI is a web framework for building HTTP-based service APIs in Python 3.8+.[3] It uses Pydantic and type hints to validate, serialize and deserialize data. FastAPI also automatically generates OpenAPI documentation for APIs built with it.[4] It was first released in 2018.

Components

Pydantic

Pydantic is a data validation library for Python. While writing code in an IDE, Pydantic provides type hints for schema validation and serialization through type annotations.[5]

Starlette

Starlette is a lightweight ASGI framework/toolkit, to support async functionality in Python.[6]

Uvicorn

Uvicorn is a minimal low-level server/application web server for async frameworks, following the ASGI specification. Technically, it implements a multi-process model with one main process, which is responsible for managing a pool of worker processes and distributing incoming HTTP requests to them. The number of worker processes is pre-configured, but can also be adjusted up or down at runtime.[7]

Example

The following code shows a simple web application that displays "Hello World!" when visited:

from fastapi import FastAPI

app = FastAPI()

@app.get("/")
def read_root():
    return "Hello World!"

See also

References

  1. ^ "fastapi repo". GitHub. 2018-12-05.
  2. ^ "Release 0.115.0". 17 September 2024. Retrieved 21 September 2024.
  3. ^ "FastAPI". fastapi.tiangolo.com. Retrieved 2024-04-10.
  4. .
  5. ^ "Why use Pydantic - Pydantic". docs.pydantic.dev. Retrieved 2023-09-21.
  6. ^ "Starlette". www.starlette.io. Retrieved 2023-09-21.
  7. ^ "Restarting 'uvicorn' Workers with the 'SIGHUP' Signal". bugfactory.io. Retrieved 2024-06-17.