dropbase-banner.svg...

fastapi-course-bundle-banner.png...

fastapi-course-bundle-banner.svg...

Tout ceci est donc ce qui donne sa force à **FastAPI** (à travers Starlette) et lui permet d'avoir des performances aussi impressionnantes.

## Détails très techniques

!!! warning "Attention !"
    Vous pouvez probablement ignorer cela.

    Ce sont des détails très poussés sur comment **FastAPI** fonctionne en arrière-plan.

* <a href="https://docs.porter.run/language-specific-guides/fastapi" class="external-link" target="_blank">Porter</a>

<img src="/img/tutorial/security/image01.png">

!!! check "Authorize button!"
    You already have a shiny new "Authorize" button.

    And your *path operation* has a little lock in the top-right corner that you can click.

And if you click it, you have a little authorization form to type a `username` and `password` (and other optional fields):

<img src="/img/tutorial/security/image02.png">

!!! note

* The process can be **terminated** (or "killed") by you, or by the operating system. At that point, it stops running/being executed, and it can **no longer do things**.
* Each application that you have running on your computer has some process behind it, each running program, each window, etc. And there are normally many processes running **at the same time** while a computer is on.

```console
// Create an env var MY_NAME in line for this program call
$ MY_NAME="Wade Wilson" python main.py

// Now it can read the environment variable

Hello Wade Wilson from Python

// The env var no longer exists afterwards
$ python main.py

Hello World from Python
```

</div>

!!! tip
    👆 💪 ✍ 🌅 🔃 ⚫️ <a href="https://12factor.net/config" class="external-link" target="_blank">1️⃣2️⃣-⚖ 📱: 📁</a>.

data = {
    "plumbus": {"description": "Freshly pickled plumbus", "owner": "Morty"},
    "portal-gun": {"description": "Gun to create portals", "owner": "Rick"},
}


class OwnerError(Exception):
    pass


def get_username():
    try:
        yield "Rick"
    except OwnerError as e:
        raise HTTPException(status_code=400, detail=f"Owner error: {e}")


@app.get("/items/{item_id}")

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