* \r} or {@code \r\n}, do not include the line separator in each line and do not consider there to
 * be an empty line at the end if the contents are terminated with a line separator.
 *
 * <p>Any {@link ByteSource} containing text encoded with a specific {@linkplain Charset character
 * encoding} may be viewed as a {@code CharSource} using {@link ByteSource#asCharSource(Charset)}.
 *

먼저, 물론 `Path`, `Query` 및 요청 본문 매개변수 선언을 자유롭게 혼합해서 사용할 수 있고, **FastAPI**는 어떤 동작을 할지 압니다.

또한 기본 값을 `None`으로 설정해 본문 매개변수를 선택사항으로 선언할 수 있습니다:

{* ../../docs_src/body_multiple_params/tutorial001_an_py310.py hl[18:20] *}

/// note | 참고

이 경우에는 본문에서 가져올 `item`이 선택사항이라는 점을 유의하세요. 기본값이 `None`이기 때문입니다.

///

## 다중 본문 매개변수 { #multiple-body-parameters }

이전 예제에서, *경로 처리*는 아래처럼 `Item`의 속성을 가진 JSON 본문을 예상합니다:

```Python
{
    "name": "Barz",
    "price": 3,
    "description": None,
}
```

因为其中未包含已存储的属性 `"tax": 20.2`，输入模型会取 `"tax": 10.5` 的默认值。

因此，保存的数据会带有这个“新的” `tax` 值 `10.5`。

## 用 `PATCH` 进行部分更新 { #partial-updates-with-patch }

也可以使用 [HTTP `PATCH`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/PATCH) 操作对数据进行*部分*更新。

也就是说，你只需发送想要更新的数据，其余数据保持不变。

/// note | 注意

`PATCH` 没有 `PUT` 知名，也没那么常用。

## 宣告中繼資料 { #declare-metadata }

你可以宣告與 `Query` 相同的所有參數。

例如，若要為路徑參數 `item_id` 宣告 `title` 中繼資料，可以這樣寫：

{* ../../docs_src/path_params_numeric_validations/tutorial001_an_py310.py hl[10] *}

/// note

路徑參數一定是必填，因為它必須是路徑的一部分。即使你將其宣告為 `None` 或設定預設值，也不會有任何影響，它仍然是必填。

///

## 依需求調整參數順序 { #order-the-parameters-as-you-need }

/// tip

如果你使用 `Annotated`，這點大概沒那麼重要或必要。

///

假設你想把查詢參數 `q` 宣告為必要的 `str`。

 *     code that is still catching {@code ComputationException} may need to be updated to catch some
 *     of those types instead. (Note that this type, though deprecated, is not planned to be removed
 *     from Guava.)
 */
@Deprecated
@GwtCompatible
public class ComputationException extends RuntimeException {
  /** Creates a new instance with the given cause. */

 *     code that is still catching {@code ComputationException} may need to be updated to catch some
 *     of those types instead. (Note that this type, though deprecated, is not planned to be removed
 *     from Guava.)
 */
@Deprecated
@GwtCompatible
public class ComputationException extends RuntimeException {
  /** Creates a new instance with the given cause. */

import java.io.File;

import org.apache.maven.toolchain.model.PersistedToolchains;

/**
 * Builds the toolchains model from a previously configured filesystem path to the toolchains file.
 * <strong>Note:</strong> This is an internal component whose interface can change without prior notice.
 *
 * @deprecated use {@link org.apache.maven.toolchain.building.ToolchainsBuilder} instead
 */
@Deprecated

//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package http

import (
	"context"
	"net"
	"syscall"
	"time"
)

// CheckPortAvailability - check if given host and port is already in use.
// Note: The check method tries to listen on given port and closes it.

    assertThat(transformation.isVertical()).isFalse();
    assertThat(transformation.isHorizontal()).isFalse();
    assertThat(transformation.slope()).isWithin(ALLOWED_ERROR).of(slope);
    // Note that we cannot test the actual mapping of points, as the results will be unreliable due
    // to loss of precision with this value of the slope.
  }

  public void testMappingWithSlope_maximalSlope() {

    assertThat(transformation.isVertical()).isFalse();
    assertThat(transformation.isHorizontal()).isFalse();
    assertThat(transformation.slope()).isWithin(ALLOWED_ERROR).of(slope);
    // Note that we cannot test the actual mapping of points, as the results will be unreliable due
    // to loss of precision with this value of the slope.
  }

  public void testMappingWithSlope_maximalSlope() {