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+

- [v1.3.10](#v1310)
  - [Downloads for v1.3.10](#downloads-for-v1310)
    - [Client Binaries](#client-binaries)
    - [Server Binaries](#server-binaries)
  - [Changelog since v1.3.9](#changelog-since-v139)
    - [Other notable changes](#other-notable-changes)
- [v1.3.9](#v139)
  - [Downloads](#downloads)
  - [Changelog since v1.3.8](#changelog-since-v138)
    - [Other notable changes](#other-notable-changes-1)
- [v1.3.8](#v138)

#
# This file is autogenerated by pip-compile with Python 3.9
# by the following command:
#
#    bazel run //ci/official/requirements_updater:requirements.update
#
absl-py==2.1.0 \
    --hash=sha256:526a04eadab8b4ee719ce68f204172ead1027549089702d99b9059f129ff1308 \
    --hash=sha256:7820790efbb316739cde8b4e19357243fc3608a152024288513dd968d7d959ff
    # via
    #   keras-nightly
    #   tb-nightly
astor==0.7.1 \

pkg debug/elf, const R_MIPS_TLS_DTPMOD32 = 38
pkg debug/elf, const R_MIPS_TLS_DTPMOD32 R_MIPS
pkg debug/elf, const R_MIPS_TLS_DTPMOD64 = 40
pkg debug/elf, const R_MIPS_TLS_DTPMOD64 R_MIPS
pkg debug/elf, const R_MIPS_TLS_DTPREL32 = 39
pkg debug/elf, const R_MIPS_TLS_DTPREL32 R_MIPS
pkg debug/elf, const R_MIPS_TLS_DTPREL64 = 41
pkg debug/elf, const R_MIPS_TLS_DTPREL64 R_MIPS
pkg debug/elf, const R_MIPS_TLS_DTPREL_HI16 = 44

#
# This file is autogenerated by pip-compile with Python 3.9
# by the following command:
#
#    bazel run //ci/official/requirements_updater:requirements.update
#
absl-py==2.1.0 \
    --hash=sha256:526a04eadab8b4ee719ce68f204172ead1027549089702d99b9059f129ff1308 \
    --hash=sha256:7820790efbb316739cde8b4e19357243fc3608a152024288513dd968d7d959ff
    # via
    #   keras-nightly
    #   tb-nightly
astor==0.7.1 \

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+

        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),

/// tip | "팁"

시간에 쫓기고 있고 이미 이런것들을 알고 있다면 [`Dockerfile`👇](#build-a-docker-image-for-fastapi)로 점프할 수 있습니다.

///

<details>
<summary>도커파일 미리보기 👀</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

pkg debug/dwarf, const AttrNamelistItem = 68
pkg debug/dwarf, const AttrOrdering = 9
pkg debug/dwarf, const AttrPriority = 69
pkg debug/dwarf, const AttrProducer = 37
pkg debug/dwarf, const AttrPrototyped = 39
pkg debug/dwarf, const AttrRanges = 85
pkg debug/dwarf, const AttrReturnAddr = 42
pkg debug/dwarf, const AttrSegment = 70
pkg debug/dwarf, const AttrSibling = 1
pkg debug/dwarf, const AttrSpecification = 71

ur(),this.highlightHour();break;case"minute":this.incrementMinute(),this.highlightMinute();break;case"second":this.incrementSecond(),this.highlightSecond();break;case"meridian":this.toggleMeridian(),this.highlightMeridian()}this.update();break;case 39:a.preventDefault(),this.highlightNextUnit(),this.updateFromElementVal();break;case 40:switch(a.preventDefault(),this.highlightedUnit){case"hour":this.decrementHour(),this.highlightHour();break;case"minute":this.decrementMinute(),this.highlightMinut...