### 당신만의 비동기 코드 작성하기

Starlette(그리고 FastAPI)는 <a href="https://anyio.readthedocs.io/en/stable/" class="external-link" target="_blank">AnyIO</a>를 기반으로 하고있고, 따라서 파이썬 표준 라이브러리인 <a href="https://docs.python.org/3/library/asyncio-task.html" class="external-link" target="_blank">asyncio</a> 및 <a href="https://trio.readthedocs.io/en/stable/" class="external-link" target="_blank">Trio</a>와 호환됩니다.

    /** The key of the message: {item} must be between {min} and {max}. */
    public static final String CONSTRAINTS_Range_MESSAGE = "{constraints.Range.message}";

    /** The key of the message: {item} contains unsafe HTML content. */
    public static final String CONSTRAINTS_SafeHtml_MESSAGE = "{constraints.SafeHtml.message}";

    /** The key of the message: The script expression "{script}" is not true. */

        .newBuilder()
        .dns(FakeDns())
        .build()
    assertFailsWith<UnknownHostException> {
      getResponse(
        Request
          .Builder()
          .url("http://1234.1.1.1/index.html".toHttpUrl())
          .build(),
      )
    }
  }

  private fun testServerClosesOutput(mockResponse: MockResponse) {
    server.enqueue(mockResponse)

    }

    /**
     * This supports painless invocation by the Verifier during embedded execution of the core ITs.
     * See <a href="http://maven.apache.org/shared/maven-verifier/xref/org/apache/maven/it/Embedded3xLauncher.html">
     * <code>Embedded3xLauncher</code> in <code>maven-verifier</code></a>
     *
     * @param args CLI args
     * @param workingDirectory working directory
     * @param stdout stdout
     * @param stderr stderr

     * @param filter the LDAP search filter to escape (null is treated as empty string)
     * @return the escaped filter string safe for use in LDAP queries (empty string if filter is null)
     * @see <a href="https://tools.ietf.org/html/rfc4515">RFC 4515 - LDAP String Representation of Search Filters</a>
     */
    protected String escapeLDAPSearchFilter(final String filter) {
        if (filter == null) {
            return "";
        }

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip | 豆知識

この設定は通常、仮想環境を作成した際に**一度だけ**行います。

///

## 仮想環境の無効化

プロジェクトの作業が終了したら、その仮想環境を**無効化**できます。

<div class="termy">

* 🐛 Fix support for form values with empty strings interpreted as missing (`None` if that's the default), for compatibility with HTML forms. PR [#13537](https://github.com/fastapi/fastapi/pull/13537) by [@MarinPostma](https://github.com/MarinPostma).

### Docs

			wantResult: `{"_1":-3}`,
		},
		// Examples from https://docs.aws.amazon.com/AmazonS3/latest/userguide/s3-glacier-select-sql-reference-date.html#s3-glacier-select-sql-reference-date-diff
		{
			name:       "date_diff_year",
			query:      `SELECT date_diff(year, '2010-01-01T', '2011-01-01T') FROM S3Object LIMIT 1`,
			wantResult: `{"_1":1}`,
		},
		{

pkg go/types, type TypeName struct
pkg go/types, type Var struct
pkg go/types, var Typ []*Basic
pkg go/types, var Universe *Scope
pkg go/types, var Unsafe *Package
pkg html/template, method (*Template) Option(...string) *Template
pkg image, const YCbCrSubsampleRatio410 = 5
pkg image, const YCbCrSubsampleRatio410 YCbCrSubsampleRatio
pkg image, const YCbCrSubsampleRatio411 = 4

**FastAPI**を使用している場合、その「最初の」関数が*path operation 関数*であり、FastAPIが正しく実行する方法を知っているので、心配する必要はありません。

しかし、FastAPI以外で `async` / `await` を使用したい場合は、<a href="https://docs.python.org/3/library/asyncio-task.html#coroutine" class="external-link" target="_blank">公式Pythonドキュメントを参照して下さい</a>。

### 非同期コードの他の形式

`async` と `await` を使用するスタイルは、この言語では比較的新しいものです。

非同期コードの操作がはるかに簡単になります。