fastapi 0.93.0

on Python PyPI

Features

• ✨ Add support for lifespan async context managers (superseding startup and shutdown events). Initial PR #2944 by @uSpike.

Now, instead of using independent startup and shutdown events, you can define that logic in a single function with yield decorated with @asynccontextmanager (an async context manager).

For example:

from contextlib import asynccontextmanager

from fastapi import FastAPI


def fake_answer_to_everything_ml_model(x: float):
    return x * 42


ml_models = {}


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Load the ML model
    ml_models["answer_to_everything"] = fake_answer_to_everything_ml_model
    yield
    # Clean up the ML models and release the resources
    ml_models.clear()


app = FastAPI(lifespan=lifespan)


@app.get("/predict")
async def predict(x: float):
    result = ml_models["answer_to_everything"](x)
    return {"result": result}

Note: This is the recommended way going forward, instead of using startup and shutdown events.

Read more about it in the new docs: Advanced User Guide: Lifespan Events.

Docs

• ✏ Fix formatting in docs/en/docs/tutorial/metadata.md for ReDoc. PR #6005 by @eykamp.

Translations

• 🌐 Tamil translations - initial setup. PR #5564 by @gusty1g.
• 🌐 Add French translation for docs/fr/docs/advanced/path-operation-advanced-configuration.md. PR #9221 by @axel584.
• 🌐 Add French translation for docs/tutorial/debugging.md. PR #9175 by @frabc.
• 🌐 Initiate Armenian translation setup. PR #5844 by @har8.
• 🌐 Add French translation for deployment/manually.md. PR #3693 by @rjNemo.

Internal

• 👷 Update translation bot messages. PR #9206 by @tiangolo.
• 👷 Update translations bot to use Discussions, and notify when a PR is done. PR #9183 by @tiangolo.
• 🔧 Update sponsors-badges. PR #9182 by @tiangolo.
• 👥 Update FastAPI People. PR #9181 by @github-actions[bot].
• 🔊 Log GraphQL errors in FastAPI People, because it returns 200, with a payload with an error. PR #9171 by @tiangolo.
• 💚 Fix/workaround GitHub Actions in Docker with git for FastAPI People. PR #9169 by @tiangolo.
• ♻️ Refactor FastAPI Experts to use only discussions now that questions are migrated. PR #9165 by @tiangolo.
• ⬆️ Upgrade analytics. PR #6025 by @tiangolo.
• ⬆️ Upgrade and re-enable installing Typer-CLI. PR #6008 by @tiangolo.