///

## Automatische Konvertierung { #automatic-conversion }

`Header` bietet etwas zusätzliche Funktionalität im Vergleich zu `Path`, `Query` und `Cookie`.

Die meisten Standard-Header sind durch ein „Bindestrich“-Zeichen getrennt, auch bekannt als „Minus-Symbol“ (`-`).

Aber eine Variable wie `user-agent` ist in Python ungültig.

### Simple types { #simple-types }

You can declare all the standard Python types, not only `str`.

You can use, for example:

* `int`
* `float`
* `bool`
* `bytes`

{* ../../docs_src/python_types/tutorial005_py310.py hl[1] *}

### `typing` module { #typing-module }

 *
 * <p>Each of the {@code standard} methods, where appropriate, uses the set's comparator (or the
 * natural ordering of the elements, if there is no comparator) to test element equality. As a
 * result, if the comparator is not consistent with equals, some of the standard implementations may
 * violate the {@code Set} contract.
 *
 * <p>The {@code standard} methods and the collection views they return are not guaranteed to be

// just enough to support pprof.
//
// Usage:
//
//	go tool addr2line binary
//
// Addr2line reads hexadecimal addresses, one per line and with optional 0x prefix,
// from standard input. For each input address, addr2line prints two output lines,
// first the name of the function containing the address and second the file:line
// of the source code corresponding to that address.
//

<div class="termy">

```console
$ pip install "uvicorn[standard]"

---> 100%
```

</div>

他の ASGI サーバープログラムでも同様の手順です。

/// tip | 豆知識

`standard` を付けると、Uvicorn は推奨の追加依存関係もインストールして使用します。

その中には、`uvloop` も含まれます。これは `asyncio` の高性能なドロップイン代替で、大きな並行実行性能の向上をもたらします。

`pip install "fastapi[standard]"` のように FastAPI をインストールした場合は、すでに `uvicorn[standard]` も含まれます。

///

Asegúrate de crear un [entorno virtual](../virtual-environments.md), actívalo, y luego **instala FastAPI**:

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

/// note | Nota

Cuando instalas con `pip install "fastapi[standard]"` viene con algunas dependencias opcionales estándar por defecto, incluyendo `fastapi-cloud-cli`, que te permite hacer deploy a [FastAPI Cloud](https://fastapicloud.com).

Bu durumda standart `dataclasses` yerine, drop-in replacement olan `pydantic.dataclasses` kullanabilirsiniz:

{* ../../docs_src/dataclasses_/tutorial003_py310.py hl[1,4,7:10,13:16,22:24,27] *}

1. `field` hâlâ standart `dataclasses` içinden import edilir.

2. `pydantic.dataclasses`, `dataclasses` için bir drop-in replacement'tır.

                    return new StandardImplForwardingList<>(Lists.newArrayList(elements));
                  }
                })
            .named("ForwardingList[ArrayList] with standard implementations")
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.ALLOWS_NULL_VALUES,
                ListFeature.GENERAL_PURPOSE)
            .createTestSuite());

                    return new StandardImplForwardingList<>(Lists.newArrayList(elements));
                  }
                })
            .named("ForwardingList[ArrayList] with standard implementations")
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.ALLOWS_NULL_VALUES,
                ListFeature.GENERAL_PURPOSE)
            .createTestSuite());

If you use a `requirements.txt` file you could specify the version with:

```txt
fastapi[standard]==0.112.0
```

that would mean that you would use exactly the version `0.112.0`.

Or you could also pin it with:

```txt
fastapi[standard]>=0.112.0,<0.113.0
```