依赖项函数的形式和结构与*路径操作函数*一样。

因此，可以把依赖项当作没有「装饰器」（即，没有 `@app.get("/some-path")` ）的路径操作函数。

依赖项可以返回各种内容。

本例中的依赖项预期接收如下参数：

* 类型为 `str` 的可选查询参数 `q`
* 类型为 `int` 的可选查询参数 `skip`，默认值是 `0`
* 类型为 `int` 的可选查询参数 `limit`，默认值是 `100`

然后，依赖项函数返回包含这些值的 `dict`。

### 导入 `Depends`

{* ../../docs_src/dependencies/tutorial001.py hl[3] *}

### 声明依赖项

与在*路径操作函数*参数中使用 `Body`、`Query` 的方式相同，声明依赖项需要使用 `Depends` 和一个新的参数：

                            "implementation"(kotlin("stdlib"))
                            // TODO remove once JSpecify is part of the Gradle API
                            "implementation"("org.jspecify:jspecify:1.0.0")
                        }
                    }
                    project(":v1") {
                        version = "1.0"
                    }
                    project(":v2") {

        ArtifactSpec a = createArtifactSpec("a", "1.0");
        createArtifactSpec("c", "2.0");
        a.addDependency("c", "[10.0,)");

        ArtifactResolutionResult res = collect(a);

        assertTrue(res.hasVersionRangeViolations(), "Expected " + res + ".hasVersionRangeViolations() to return true");
    }

    @Test

* Başlatma ve kapatma olayları.
* HTTPX ile geliştirilmiş bir test istemcisi.
* CORS, GZip, Static Files ve Streaming cevapları desteği.
* Session ve çerez desteği.
* Kodun %100'ü test kapsamında.
* Kodun %100'ü tip belirteçleriyle desteklenmiştir.
* Yalnızca bir kaç zorunlu bağımlılığa sahip.

          httpHeaders.add(name, value)
        } else {
          throw IllegalStateException()
        }
        if (name == "expect" && value.equals("100-continue", ignoreCase = true)) {
          // Don't read the body unless we've invited the client to send it.
          readBody = false
        }
      }
      val headers = httpHeaders.build()

fastapi[standard]>=0.113.0,<0.114.0
pydantic>=2.7.0,<3.0.0
```

И обычно вы установите эти зависимости командой `pip`, например:

<div class="termy">

```console
$ pip install -r requirements.txt
---> 100%
Successfully installed fastapi pydantic
```

</div>

/// info | Информация

Существуют и другие форматы и инструменты для описания и установки зависимостей.

///

	// STREAMS
	// Set an output capacity of 100 for consoleLog and listenRPC
	// There is another buffer that will buffer events.
	consoleLogRPC = grid.NewStream[*grid.MSS, grid.NoPayload, *grid.Bytes](grid.HandlerConsoleLog, grid.NewMSS, nil, grid.NewBytes).WithOutCapacity(100)

* Einen optionalen Query-Parameter `q`, der ein `str` ist.
* Einen optionalen Query-Parameter `skip`, der ein `int` ist und standardmäßig `0` ist.
* Einen optionalen Query-Parameter `limit`, der ein `int` ist und standardmäßig `100` ist.

Und dann wird einfach ein <abbr title="Dictionary – Zuordnungstabelle: In anderen Sprachen auch Hash, Map, Objekt, Assoziatives Array genannt">`dict`</abbr> zurückgegeben, welches diese Werte enthält.

/// info | Info

    utf8Lengths.put(MAX_CODE_POINT, 4);

    Integer[] codePoints = utf8Lengths.keySet().toArray(new Integer[] {});
    StringBuilder sb = new StringBuilder();
    Random rnd = new Random();
    for (int trial = 0; trial < 100; trial++) {
      sb.setLength(0);
      int utf8Length = 0;
      for (int i = 0; i < 6; i++) {
        Integer randomCodePoint = codePoints[rnd.nextInt(codePoints.length)];
        sb.appendCodePoint(randomCodePoint);

 * when maximumSize is reached, etc.
 *
 * @author mike nonemacher
 */
@NullUnmarked
public class CacheEvictionTest extends TestCase {
  static final int MAX_SIZE = 100;

  public void testEviction_setMaxSegmentSize() {
    IdentityLoader<Object> loader = identityLoader();
    for (int i = 1; i < 1000; i++) {