*       source as they are read from it. A source that provides such readers will not be reusable,
 *       and operations that read from the stream (including {@link #length()}, in some
 *       implementations) will prevent further operations from completing as expected.
 * </ul>
 *
 * @since 14.0
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
public abstract class CharSource {

 *       source as they are read from it. A source that provides such readers will not be reusable,
 *       and operations that read from the stream (including {@link #length()}, in some
 *       implementations) will prevent further operations from completing as expected.
 * </ul>
 *
 * @since 14.0
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
public abstract class CharSource {

            }
            return time;
        }
        return -1;
    }

    /**
     * Retrieves a list of access results from the data service for processing.
     * Filters out results that are too recent based on commit margin time and manages crawler throttling.
     *
     * @param cb the consumer to customize the search request
     * @param cleanupTime the time taken for the last cleanup operation

</p>
<p align="center">
<a href="https://github.com/fastapi/fastapi/actions?query=workflow%3ATest+event%3Apush+branch%3Amaster" target="_blank">
    <img src="https://github.com/fastapi/fastapi/actions/workflows/test.yml/badge.svg?event=push&branch=master" alt="Test">
</a>
<a href="https://coverage-badge.samuelcolvin.workers.dev/redirect/fastapi/fastapi" target="_blank">

	if context == ctxEmbedType {
		error_(sel.Pos(), "cannot embed C type")
	}
	goname := sel.Sel.Name
	if goname == "errno" {
		error_(sel.Pos(), "cannot refer to errno directly; see documentation")
		return
	}
	if goname == "_CMalloc" {
		error_(sel.Pos(), "cannot refer to C._CMalloc; use C.malloc")
		return
	}
	if goname == "malloc" {
		goname = "_CMalloc"
	}
	name := f.Name[goname]
	if name == nil {

          </description>
          <association>
            <type>RepositoryPolicy</type>
          </association>
        </field>
      </fields>
      <!-- prevent Modello generation of an incorrect equals method. Could be avoided by using <identity/> tags to mark ID as the only identity field -->
      <codeSegments>
        <codeSegment>
          <version>1.0.0/1.1.0</version>

 *       bytes of the source as they are read from it. A source that provides such streams will not
 *       be reusable, and operations that read from the stream (including {@link #size()}, in some
 *       implementations) will prevent further operations from completing as expected.
 * </ul>
 *
 * @since 14.0
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
public abstract class ByteSource {

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// Error importando sirius, no está instalado 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// Erro ao importar o Sirius, ele não está instalado 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

하지만 이로 인해 비동기 코드 작업이 훨씬 간단해졌습니다.

같은 (또는 거의 유사한) 문법은 최신 버전의 자바스크립트(브라우저와 NodeJS)에도 추가되었습니다.

하지만 그 이전에, 비동기 코드를 처리하는 것은 꽤 복잡하고 어려운 일이었습니다.

파이썬의 예전 버전이라면, 스레드 또는 <a href="https://www.gevent.org/" class="external-link" target="_blank">Gevent</a>를 사용할 수 있을 것입니다. 하지만 코드를 이해하고, 디버깅하고, 이에 대해 생각하는게 훨씬 복잡합니다.

예전 버전의 NodeJS / 브라우저 자바스크립트라면, "콜백 함수"를 사용했을 것입니다. 그리고 이로 인해 "콜백 지옥"에 빠지게 될 수 있습니다.

## 코루틴