### Certificate Renewal

At some point in the future, each certificate would **expire** (about 3 months after acquiring it).

And then, there would be another program (in some cases it's another program, in some cases it could be the same TLS Termination Proxy) that would talk to Let's Encrypt, and renew the certificate(s).

    return {"in": "main-depends", "params": commons}


@app.get("/decorator-depends/", dependencies=[Depends(common_parameters)])
async def decorator_depends():
    return {"in": "decorator-depends"}


@router.get("/router-depends/")
async def router_depends(commons: dict = Depends(common_parameters)):
    return {"in": "router-depends", "params": commons}

Diese werden zu ihren entsprechenden Werten konvertiert (in diesem Fall Strings), bevor sie zum Client übertragen werden:

```Python hl_lines="18  21  23"
{!../../../docs_src/path_params/tutorial005.py!}
```

In Ihrem Client erhalten Sie eine JSON-Response, wie etwa:

```JSON
{
  "model_name": "alexnet",
  "message": "Deep Learning FTW!"
}
```

Aber in den meisten Fällen, wenn wir so etwas machen, wollen wir nur, dass das Modell einige der Daten **filtert/entfernt**, so wie in diesem Beispiel.

This code is something you can actually use in your application, save the password hashes in your database, etc.

We are going to start from where we left in the previous chapter and increment it.

## About JWT

JWT means "JSON Web Tokens".

It's a standard to codify a JSON object in a long dense string without spaces. It looks like this:

```

    As the list is a type that contains some internal types, you put them in square brackets:

    ```Python hl_lines="4"
    {!> ../../../docs_src/python_types/tutorial006.py!}
    ```

!!! info
    Those internal types in the square brackets are called "type parameters".

    In this case, `str` is the type parameter passed to `List` (or `list` in Python 3.9 and above).

    assert item["title"] == item_data["title"]
    assert item["description"] == item_data["description"]
    assert "id" in item_data
    assert "owner_id" in item_data
    response = client.get("/users/1")
    assert response.status_code == 200, response.text
    user_data = response.json()
    item_to_check = [it for it in user_data["items"] if it["id"] == item_data["id"]][0]
    assert item_to_check["title"] == item["title"]

!!! note "Hinweis"
    Wenn Ihnen das nichts sagt, lesen Sie den [Async: *„In Eile?“*](../../async.md#in-eile){.internal-link target=_blank}-Abschnitt über `async` und `await` in der Dokumentation.

## Integriert in OpenAPI

Alle Requestdeklarationen, -validierungen und -anforderungen Ihrer Abhängigkeiten (und Unterabhängigkeiten) werden in dasselbe OpenAPI-Schema integriert.

                pr_commentors.add(comment.author.login)
        for author_name in pr_commentors:
            commenters[author_name] += 1
        for review in pr.reviews.nodes:
            if review.author:
                authors[review.author.login] = review.author
                pr_reviewers.add(review.author.login)
                for label in pr.labels.nodes:
                    if label.name == "lang-all":

    assert item["title"] == item_data["title"]
    assert item["description"] == item_data["description"]
    assert "id" in item_data
    assert "owner_id" in item_data
    response = client.get("/users/1")
    assert response.status_code == 200, response.text
    user_data = response.json()
    item_to_check = [it for it in user_data["items"] if it["id"] == item_data["id"]][0]
    assert item_to_check["title"] == item["title"]