For example, you can raise a different exception, like `HTTPException`.

/// tip

This is a somewhat advanced technique, and in most of the cases you won't really need it, as you can raise exceptions (including `HTTPException`) from inside of the rest of your application code, for example, in the *path operation function*.

But it's there for you if you need it. 🤓

///

I could shut up like a telescope!  I think I could, if I only
know how to begin.'  For, you see, so many out-of-the-way things
had happened lately, that Alice had begun to think that very few
things indeed were really impossible.

  There seemed to be no use in waiting by the little door, so she
went back to the table, half hoping she might find another key on
it, or at any rate a book of rules for shutting people up like

### Alternatif API Dokümantasyonu { #alternative-api-docs }

Ve şimdi [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc) adresine gidin.

Alternatif otomatik dokümantasyonu ([ReDoc](https://github.com/Rebilly/ReDoc) tarafından sağlanan) göreceksiniz:

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

### OpenAPI { #openapi }

* [**Swagger UI**](https://github.com/swagger-api/swagger-ui)，可交互式操作，能在浏览器中直接调用和测试你的 API。

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* 另外的 API 文档：[**ReDoc**](https://github.com/Rebilly/ReDoc)

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### 更主流的 Python { #just-modern-python }

全部都基于标准的 **Python 类型** 声明（感谢 Pydantic）。没有新的语法需要学习。只需要标准的现代 Python。

        if (notReallyReleased.isEmpty() == false) {
            throw new IllegalStateException(
                "out-of-date released versions"
                    + "\nFollowing versions are not really released, but the build thinks they are: "
                    + notReallyReleased
            );
        }

        Set<Version> incorrectlyConsideredUnreleased = new HashSet<>(authoritativeReleasedVersions);

Here are the affected tests:
EOF
    while read dep; do
      echo "For dependency $dep:"
      # For every missing dependency, find the tests which directly depend on
      # it, and print that list for debugging. Not really clear if this is
      # helpful since the only examples I've seen are enormous.
      bazel cquery "rdeps(kind(py_test, $(cat $BATS_TEST_TMPDIR/deps)), $dep, 1)"
    done < $BATS_TEST_TMPDIR/missing_deps
    exit 1
  fi

	}
}

func (sr *sparseFileReader) WriteTo(w io.Writer) (n int64, err error) {
	ws, ok := w.(io.WriteSeeker)
	if ok {
		if _, err := ws.Seek(0, io.SeekCurrent); err != nil {
			ok = false // Not all io.Seeker can really seek
		}
	}
	if !ok {
		return io.Copy(w, struct{ io.Reader }{sr})
	}

	var writeLastByte bool
	pos0 := sr.pos
	for sr.logicalRemaining() > 0 && !writeLastByte && err == nil {

### 대안 API 문서 { #alternative-api-docs }

그리고 이제, [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc)로 가봅니다.

대안 자동 문서를 볼 수 있습니다 ([ReDoc](https://github.com/Rebilly/ReDoc) 제공):

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

### OpenAPI { #openapi }

**FastAPI**는 API를 정의하기 위한 **OpenAPI** 표준을 사용하여 여러분의 모든 API를 이용해 "스키마"를 생성합니다.

    def make_not_authenticated_error(self) -> HTTPException:
        """
        The OAuth 2 specification doesn't define the challenge that should be used,
        because a `Bearer` token is not really the only option to authenticate.

        But declaring any other authentication challenge would be application-specific
        as it's not defined in the specification.

Y ahora, ve a [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc).

Verás la documentación alternativa automática (proporcionada por [ReDoc](https://github.com/Rebilly/ReDoc)):

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

### OpenAPI { #openapi }

**FastAPI** genera un "esquema" con toda tu API utilizando el estándar **OpenAPI** para definir APIs.