of the bottle was a paper label, with the words `DRINK ME'
beautifully printed on it in large letters.

  It was all very well to say `Drink me,' but the wise little
Alice was not going to do THAT in a hurry.  `No, I'll look
first,' she said, `and see whether it's marked "poison" or not';
for she had read several nice little histories about children who
had got burnt, and eaten up by wild beasts and other unpleasant

# Конкурентность и async / await { #concurrency-and-async-await }

Подробности о синтаксисе `async def` для *функций-обработчиков пути* и немного фона об асинхронном коде, конкурентности и параллелизме.

## Нет времени? { #in-a-hurry }

<abbr title="too long; didn't read – слишком длинно; не читал"><strong>TL;DR:</strong></abbr>

Если вы используете сторонние библиотеки, которые нужно вызывать с `await`, например:

```Python
results = await some_library()

@app.get("/items/{item_id}")
async def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

**Note**:

If you don't know, check the _"In a hurry?"_ section about <a href="https://fastapi.tiangolo.com/async/#in-a-hurry" target="_blank">`async` and `await` in the docs</a>.

</details>

### Run it { #run-it }

Run the server with:

<div class="termy">

```console

@app.get("/items/{item_id}")
async def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

**注意**：

如果你不知道是否會用到，可以查看 _"In a hurry?"_ 章節中，關於 <a href="https://fastapi.tiangolo.com/async/#in-a-hurry" target="_blank">`async` 和 `await` 的部分</a>。

</details>

### 運行

使用以下指令運行伺服器：

<div class="termy">

```console
$ uvicorn main:app --reload

apply fixes to bugs or security vulnerabilities:

*   Clone the TensorFlow repository and switch to the appropriate branch for
    your desired version—for example, `r2.8` for version 2.8.
*   Apply the desired changes (i.e., cherry-pick them) and resolve any code
    conflicts.
*   Run TensorFlow tests and ensure they pass.
*   [Build](https://www.tensorflow.org/install/source) the TensorFlow pip
    package from source.

{* ../../docs_src/first_steps/tutorial003.py hl[7] *}

/// note | Примітка

Якщо не знаєте в чому різниця, подивіться [Конкурентність: *"Поспішаєш?"*](../async.md#in-a-hurry){.internal-link target=_blank}.

///

### Крок 5: поверніть результат

{* ../../docs_src/first_steps/tutorial001.py hl[8] *}

Ви можете повернути `dict`, `list`, а також окремі значення `str`, `int`, ітд.

import junit.framework.TestCase;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests com.google.common.base.Suppliers.
 *
 * @author Laurence Gonsalves
 * @author Harry Heymann
 */
@NullMarked
@GwtCompatible
public class SuppliersTest extends TestCase {

  static class CountingSupplier implements Supplier<Integer> {
    int calls = 0;

    @Override

import junit.framework.TestCase;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests com.google.common.base.Suppliers.
 *
 * @author Laurence Gonsalves
 * @author Harry Heymann
 */
@NullMarked
@GwtCompatible
public class SuppliersTest extends TestCase {

  static class CountingSupplier implements Supplier<Integer> {
    int calls = 0;

    @Override

Não faz diferença. O **FastAPI** sabe o que fazer.

/// note | Nota

Caso você não conheça, veja em [Async: *"Com Pressa?"*](../../async.md#in-a-hurry){.internal-link target=_blank} a sessão acerca de `async` e `await` na documentação.

///

## Integrando com OpenAPI { #integrated-with-openapi }

# Concorrência e async / await { #concurrency-and-async-await }

Detalhes sobre a sintaxe `async def` para *funções de operação de rota* e alguns conceitos de código assíncrono, concorrência e paralelismo.

## Com pressa? { #in-a-hurry }

<abbr title="too long; didn't read – muito longo; não li"><strong>TL;DR:</strong></abbr>

Se você estiver utilizando bibliotecas de terceiros que dizem para você chamar as funções com `await`, como:

```Python