& `items.router` 🔌 `APIRouter` 🔘 📁 `app/routers/items.py`.

///

⏮️ `app.include_router()` 👥 💪 🚮 🔠 `APIRouter` 👑 `FastAPI` 🈸.

⚫️ 🔜 🔌 🌐 🛣 ⚪️➡️ 👈 📻 🍕 ⚫️.

/// note | "📡 ℹ"

⚫️ 🔜 🤙 🔘 ✍ *➡ 🛠️* 🔠 *➡ 🛠️* 👈 📣 `APIRouter`.

, ⛅ 🎑, ⚫️ 🔜 🤙 👷 🚥 🌐 🎏 👁 📱.

///

/// check

👆 🚫 ✔️ 😟 🔃 🎭 🕐❔ ✅ 📻.

👉 🔜 ✊ ⏲ & 🔜 🕴 🔨 🕴.

					Action: DelMarkerDeleteAllVersionsAction,
					RuleID: rule.ID,
					Due:    due,
				})
			}
			// No other conflicting actions in this rule can apply to an object with current version as DEL marker
			// Note: There could be other rules with earlier expiration which need to be considered.
			// See TestDelMarkerExpiration
			continue
		}

		// Skip rules with newer noncurrent versions specified. These rules are

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

If you use Hypercorn, it also has the option `--root-path`.

/// note | "Technical Details"

The ASGI specification defines a `root_path` for this use case.

And the `--root-path` command line option provides that `root_path`.

///

### Checking the current `root_path`

**FastAPI** повністю базується на цих анотаціях типів, вони дають йому багато переваг.

Але навіть якщо ви ніколи не використаєте **FastAPI**, вам буде корисно дізнатись трохи про них.

/// note

Якщо ви експерт у Python і ви вже знаєте усе про анотації типів - перейдіть до наступного розділу.

///

## Мотивація

Давайте почнемо з простого прикладу:

```Python

通过声明变量的类型，编辑器和一些工具能给你提供更好的支持。

这只是一个关于 Python 类型提示的**快速入门 / 复习**。它仅涵盖与 **FastAPI** 一起使用所需的最少部分...实际上只有很少一点。

整个 **FastAPI** 都基于这些类型提示构建，它们带来了许多优点和好处。

但即使你不会用到 **FastAPI**，了解一下类型提示也会让你从中受益。

/// note

如果你已经精通 Python，并且了解关于类型提示的一切知识，直接跳到下一章节吧。

///

## 动机

让我们从一个简单的例子开始：

```Python
{!../../docs_src/python_types/tutorial001.py!}
```

运行这段程序将输出：

```
John Doe
```

	//	#define A(x)
	// and
	//	#define A (x)
	// distinctly: the first is a macro with arguments, the second without.
	// Distinguish these cases using the column number, since we don't
	// see the space itself. Note that text/scanner reports the position at the
	// end of the token. It's where you are now, and you just read this token.
	if tok == '(' && in.Stack.Col() == prevCol+1 {
		// Macro has arguments. Scan list of formals.

import org.apache.maven.model.validation.ModelValidator;

import static java.util.Objects.requireNonNull;

/**
 * A factory to create model builder instances when no dependency injection is available. Note: This class is
 * only meant as a utility for developers that want to employ the model builder outside the Maven build system, Maven

    xStats.addAll(values.xStats());
    if (yStats.count() == 0) {
      sumOfProductsOfDeltas = values.sumOfProductsOfDeltas();
    } else {
      // This is a generalized version of the calculation in add(double, double) above. Note that
      // non-finite inputs will have sumOfProductsOfDeltas = NaN, so non-finite values will result
      // in NaN naturally.
      sumOfProductsOfDeltas +=
          values.sumOfProductsOfDeltas()

     * the key would be inserted into the list: the index of the next higher element in the list, or
     * {@code list.size()} if there is no such element.
     *
     * <p>Note that the return value will be {@code >= 0} if and only if there is an element of the
     * list that compares as equal to the key.
     *

  }

  /**
   * Checks that the elements of the iterable are calculated on the fly. Concretely, that means that
   * {@link SuccessorsFunction#successors(Object)} can only be called for a subset of all nodes.
   */
  @Test
  public void forGraph_breadthFirstIterable_emptyGraph() {
    assertEqualCharNodes(
        Traverser.forGraph(createDirectedGraph()).breadthFirst(charactersOf("")), "");
    assertThrows(