///

<details>
<summary>Visualização do Dockerfile 👀</summary>

```Dockerfile
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

COPY ./app /code/app

Обидві операції шляху вимагають заголовок `X-Token`.

//// tab | Python 3.10+

```Python
{!> ../../docs_src/app_testing/app_b_an_py310/main.py!}
```

////

//// tab | Python 3.9+

```Python
{!> ../../docs_src/app_testing/app_b_an_py39/main.py!}
```

////

//// tab | Python 3.8+

```Python
{!> ../../docs_src/app_testing/app_b_an/main.py!}
```

////

            (byte) 12, (byte) 1, (byte) 40, (byte) 51, (byte) 30, (byte) 36, (byte) 46, (byte) 54, (byte) 29, (byte) 39, (byte) 50,
            (byte) 44, (byte) 32, (byte) 47, (byte) 43, (byte) 48, (byte) 38, (byte) 55, (byte) 33, (byte) 52, (byte) 45, (byte) 41,
            (byte) 49, (byte) 35, (byte) 28, (byte) 31, };

Both *path operations* require an `X-Token` header.

//// tab | Python 3.10+

```Python
{!> ../../docs_src/app_testing/app_b_an_py310/main.py!}
```

////

//// tab | Python 3.9+

```Python
{!> ../../docs_src/app_testing/app_b_an_py39/main.py!}
```

////

//// tab | Python 3.8+

```Python
{!> ../../docs_src/app_testing/app_b_an/main.py!}
```

////

			Objects: []ObjectInfo{
				{Name: "foo/201910/1112"},
				{Name: "foo/201910/1122"},
				{Name: "foo/201910/2112"},
				{Name: "foo/201910_txt"},
			},
		},
		// ListObjectsResult-39 list with prefix match 1 level deep
		39: {
			IsTruncated: false,
			Objects: []ObjectInfo{
				{Name: "201910/foo/bar/xl.meta/1.txt"},
			},
		},
		// ListObjectsResult-40
		40: {
			IsTruncated: false,

¿Tienes prisa y ya conoces esto? Salta al [`Dockerfile` más abajo 👇](#construir-una-imagen-de-docker-para-fastapi).

///

<details>
<summary>Vista previa del Dockerfile 👀</summary>

```Dockerfile
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

COPY ./app /code/app

CMD ["fastapi", "run", "app/main.py", "--port", "80"]

So we put them in their own `dependencies` module (`app/dependencies.py`).

We will now use a simple dependency to read a custom `X-Token` header:

//// tab | Python 3.9+

```Python hl_lines="3  6-8" title="app/dependencies.py"
{!> ../../docs_src/bigger_applications/app_an_py39/dependencies.py!}
```

////

//// tab | Python 3.8+

        sub.asMapOfRanges());
    assertEquals(
        ImmutableMap.of(Range.open(3, 7), 1, Range.openClosed(9, 10), 2, Range.closed(12, 16), 3),
        rangeMap.asMapOfRanges());

    sub.remove(Range.closed(3, 9));
    assertEquals(ImmutableMap.of(Range.openClosed(9, 10), 2), sub.asMapOfRanges());
    assertEquals(
        ImmutableMap.of(Range.open(3, 5), 1, Range.openClosed(9, 10), 2, Range.closed(12, 16), 3),

Мы поместим их в отдельный модуль `dependencies` (`app/dependencies.py`).

Теперь мы воспользуемся простой зависимостью, чтобы прочитать кастомизированный `X-Token` из заголовка:

//// tab | Python 3.9+

```Python hl_lines="3  6-8" title="app/dependencies.py"
{!> ../../docs_src/bigger_applications/app_an_py39/dependencies.py!}
```

////

//// tab | Python 3.8+

Also fügen wir sie in ihr eigenes `dependencies`-Modul (`app/dependencies.py`) ein.

Wir werden nun eine einfache Abhängigkeit verwenden, um einen benutzerdefinierten `X-Token`-Header zu lesen:

//// tab | Python 3.9+

```Python hl_lines="3  6-8" title="app/dependencies.py"
{!> ../../docs_src/bigger_applications/app_an_py39/dependencies.py!}
```

////

//// tab | Python 3.8+