P = ParamSpec("P")


class BackgroundTasks(StarletteBackgroundTasks):
    """
    A collection of background tasks that will be called after a response has been
    sent to the client.

    Read more about it in the
    [FastAPI docs for Background Tasks](https://fastapi.tiangolo.com/tutorial/background-tasks/).

    ## Example

    ```python
    from fastapi import BackgroundTasks, FastAPI

    app = FastAPI()

## Sobre Starlette { #about-starlette }

No deberías fijar la versión de `starlette`.

Diferentes versiones de **FastAPI** utilizarán una versión más reciente específica de Starlette.

Así que, puedes simplemente dejar que **FastAPI** use la versión correcta de Starlette.

## Sobre Pydantic { #about-pydantic }

---
name: Bug report
about: Create a report to help us improve
title: ''
labels: bug
assignees: ''

---

(_Please see [discuss.codelibs.org](https://discuss.codelibs.org/c/FessEN/8) before filing a bug._)

**Describe the bug**
A clear and concise description of what the bug is.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

As you saw in the previous chapter about [Deployment Concepts](concepts.md){.internal-link target=_blank}, there are multiple strategies you can use.

Here I'll show you how to use **Uvicorn** with **worker processes** using the `fastapi` command or the `uvicorn` command directly.

/// info

name: IDE Experience team notifier
run-name: Notify the IDE Experience team about new RCs for manual testing
on:
  push:
    tags:
      - 'v*.*.*-RC1'

permissions: {}

jobs:
  send-slack-notification:
    runs-on: ubuntu-latest
    steps:
      - name: Send Slack notification about new RCs for manual testing
        id: slack
        uses: slackapi/slack-github-action@v2.1.1
        with:

/// note

Some response codes (see the next section) indicate that the response does not have a body.

FastAPI knows this, and will produce OpenAPI docs that state there is no response body.

///

## About HTTP status codes { #about-http-status-codes }

/// note

If you already know what HTTP status codes are, skip to the next section.

///

In HTTP, you send a numeric status code of 3 digits as part of the response.

```

</div>

////

This information will be useful when learning about [Virtual Environments](virtual-environments.md){.internal-link target=_blank}.

## Conclusion { #conclusion }

With this you should have a basic understanding of what **environment variables** are and how to use them in Python.

 * thrown or a simple string message. In addition, a problem carries a hint about its source.
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface BuilderProblem {

    /**
     * Gets the hint about the source of the problem. While the syntax of this hint is unspecified and depends on the

wandered about in the wood, `is to grow to my right size again;
and the second thing is to find my way into that lovely garden.
I think that will be the best plan.'

  It sounded an excellent plan, no doubt, and very neatly and
simply arranged; the only difficulty was, that she had not the
smallest idea how to set about it; and while she was peering
about anxiously among the trees, a little sharp bark just over

* etc.

It can be convenient to quickly access HTTP (and WebSocket) status codes in your app, using autocompletion for the name without having to remember the integer status codes by memory.

Read more about it in the [FastAPI docs about Response Status Code](https://fastapi.tiangolo.com/tutorial/response-status-code/).

## Example

```python
from fastapi import FastAPI, status

app = FastAPI()