```Python
q: str | None = None
```

////

//// tab | Python 3.9+

```Python
q: Union[str, None] = None
```

////

Lo que haremos es envolver eso con `Annotated`, para que se convierta en:

//// tab | Python 3.10+

```Python
q: Annotated[str | None] = None
```

////

//// tab | Python 3.9+

```Python
q: Annotated[Union[str, None]] = None
```

////

Sie haben es eilig und kennen sich bereits aus? Springen Sie zum [`Dockerfile` unten 👇](#build-a-docker-image-for-fastapi).

///

<details>
<summary>Dockerfile-Vorschau 👀</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"]

                    .map(this::resolve)
                    .forEach(paths::add);
        }
        sessionBuilder.withLocalRepositoryBaseDirectories(paths);
        // Pass over property supported by Maven 3.9.x
        if (mergedProps.containsKey(Constants.MAVEN_REPO_LOCAL_TAIL_IGNORE_AVAILABILITY)) {
            configProps.put(
                    ChainedLocalRepositoryManager.CONFIG_PROP_IGNORE_TAIL_AVAILABILITY,

pkg debug/elf, const R_390_TLS_IE64 = 48
pkg debug/elf, const R_390_TLS_IE64 R_390
pkg debug/elf, const R_390_TLS_IEENT = 49
pkg debug/elf, const R_390_TLS_IEENT R_390
pkg debug/elf, const R_390_TLS_LDCALL = 39
pkg debug/elf, const R_390_TLS_LDCALL R_390
pkg debug/elf, const R_390_TLS_LDM32 = 45
pkg debug/elf, const R_390_TLS_LDM32 R_390
pkg debug/elf, const R_390_TLS_LDM64 = 46
pkg debug/elf, const R_390_TLS_LDM64 R_390

#   "rbe", if you have set up your system to use RBE (see further below).
#
# Here is how to choose your TFCI value:
# 1. A Python version must come first, because other scripts reference it.
#      Ex. py39  -- Python 3.9
#      Ex. py310 -- Python 3.10
#      Ex. py311 -- Python 3.11
#      Ex. py312 -- Python 3.12
# 2. Choose the platform, which corresponds to the version of TensorFlow to

¿Tienes prisa y ya conoces esto? Salta al [`Dockerfile` más abajo 👇](#build-a-docker-image-for-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"]

                        ),
                        TestCoverage(38, TestType.CONFIG_CACHE, Os.WINDOWS, JvmCategory.MAX_VERSION),
                        TestCoverage(
                            39,
                            TestType.CONFIG_CACHE,
                            Os.LINUX,
                            JvmCategory.MAX_VERSION,
                            DEFAULT_LINUX_FUNCTIONAL_TEST_BUCKET_SIZE,

            (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, };

使用 Linux 容器有几个优点，包括**安全性**、**可复制性**、**简单性**等。

/// tip

赶时间并且已经知道这些东西了？ 跳转到下面的 [`Dockerfile` 👇](#fastapi-docker_1)。

///

<details>
<summary>Dockerfile Preview 👀</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

			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,