# 동시성과 async / await

*경로 작동 함수*에서의 `async def` 문법에 대한 세부사항과 비동기 코드, 동시성 및 병렬성에 대한 배경

## 바쁘신 경우

<strong>요약</strong>

다음과 같이 `await`를 사용해 호출하는 제3의 라이브러리를 사용하는 경우:

```Python
results = await some_library()
```

다음처럼 *경로 작동 함수*를 `async def`를 사용해 선언하십시오:

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

/// note | 참고

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     * <p><strong>Security Note:</strong> This method MUST be called on all user-supplied
     * input before using it in LDAP search filters to prevent LDAP injection vulnerabilities.
     *

    This applies to `Authorization`, `Cookie`, `Proxy-Authorization`, and `Set-Cookie` headers.
 *  Fix: Don't crash with an `InaccessibleObjectException` when running on JDK17+ with strong
    encapsulation enabled.
 *  Fix: Strictly verify hostnames used with OkHttp's `HostnameVerifier`. Programs that make direct
    manual calls to `HostnameVerifier` could be defeated if the hostnames they pass in are not

# 並行処理と async / await

*path operation 関数*のための `async def` に関する詳細と非同期 (asynchronous) コード、並行処理 (Concurrency)、そして、並列処理 (Parallelism) の背景について。

## 急いでいますか？

<abbr title="too long; didn't read (長すぎて読めない人のための要約という意味のスラング)"><strong>TL;DR:</strong></abbr>

次のような、`await` を使用して呼び出すべきサードパーティライブラリを使用している場合:

```Python
results = await some_library()
```

以下の様に `async def` を使用して*path operation 関数*を宣言します。

```Python hl_lines="2"
@app.get('/')

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        The {@code <parent>} element contains information required to locate the parent project from which
        this project will inherit from.
        <p><strong>Note:</strong> The children of this element are not interpolated and must be given as literal values.</p>
        ]]>
      </description>
      <fields>
        <field>
          <name>groupId</name>

   * immutable list is returned.)
   *
   * <p><b>Note:</b> in almost all circumstances, the returned {@link ImmutableList} retains a
   * strong reference to {@code this}, which may prevent the original list from being garbage
   * collected. If you want the original list to be eligible for garbage collection, you should
   * create and use a copy of the sub list (e.g., {@code

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# Type of query highlighting.
query.highlight.type=fvh
# Tag to use before highlighted text.
query.highlight.tag.pre=<strong>
# Tag to use after highlighted text.
query.highlight.tag.post=</strong>
# Boundary characters for query highlighting.
query.highlight.boundary.chars=u0009u000Au0013u0020
# Maximum scan for query highlight boundaries.
query.highlight.boundary.max.scan=20

}

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var compressOpts []s2.WriterOption

func init() {
	if runtime.GOARCH == "amd64" {
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		compressOpts = append(compressOpts, s2.WriterBetterCompression())
	}
}

// newS2CompressReader will read data from r, compress it and return the compressed data as a Reader.

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  //    definitely observe all earlier writes, but we still have no guarantee that done() would see
  //    the initial write (just stronger guarantees if it does).
  //
  // See: http://cs.oswego.edu/pipermail/concurrency-interest/2015-January/013800.html
  // For a (long) discussion about this specific issue and the general futility of life.
  //