# Development - Contributing

First, you might want to see the basic ways to [help FastAPI and get help](help-fastapi.md){.internal-link target=_blank}.

## Developing

If you already cloned the <a href="https://github.com/fastapi/fastapi" class="external-link" target="_blank">fastapi repository</a> and you want to deep dive in the code, here are some guidelines to set up your environment.

### Virtual environment

  ): Sink {
    log("appendingSink($file)")

    return super.appendingSink(file, mustExist)
  }

  override fun atomicMove(
    source: Path,
    target: Path,
  ) {
    log("atomicMove($source, $target)")

    super.atomicMove(source, target)
  }

  override fun createDirectory(
    dir: Path,
    mustCreate: Boolean,
  ) {
    log("createDirectory($dir)")

На всех предыдущих скриншотах используется <a href="https://code.visualstudio.com" class="external-link" target="_blank">Visual Studio Code</a>.

Но у вас будет такая же поддержка и с <a href="https://www.jetbrains.com/pycharm/" class="external-link" target="_blank">PyCharm</a>, и вообще с любым редактором Python:

<img src="/img/tutorial/body/image05.png">

/// tip | "Подсказка"

* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@5/swagger-ui.css" class="external-link" target="_blank">`swagger-ui.css`</a>

Und **ReDoc** verwendet diese Datei:

* <a href="https://cdn.jsdelivr.net/npm/redoc@next/bundles/redoc.standalone.js" class="external-link" target="_blank">`redoc.standalone.js`</a>

/// tip

The actual callback is just an HTTP request.

When implementing the callback yourself, you could use something like <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a> or <a href="https://requests.readthedocs.io/" class="external-link" target="_blank">Requests</a>.

///

## Write the callback documentation code

O callback real é apenas uma solicitação HTTP.

Quando implementando o callback por você mesmo, você pode usar algo como <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a> ou <a href="https://requests.readthedocs.io/" class="external-link" target="_blank">Requisições</a>.

///

## Escrevendo o código de documentação do callback

* 可获取上传文件的元数据；
* 自带 <a href="https://docs.python.org/zh-cn/3/glossary.html#term-file-like-object" class="external-link" target="_blank">file-like</a> `async` 接口；
* 暴露的 Python <a href="https://docs.python.org/zh-cn/3/library/tempfile.html#tempfile.SpooledTemporaryFile" class="external-link" target="_blank">`SpooledTemporaryFile`</a> 对象，可直接传递给其他预期「file-like」对象的库。

### `UploadFile`

`UploadFile` 的属性如下：

            return null;
        }
        return pcd.getRawClass();
    }

    @Override
    public <T> T invoke(final Object target, final Object... args) {
        assertArgumentNotNull("target", target);

        return MethodUtil.invoke(method, target, args);
    }

    @Override
    public <T> T invokeStatic(final Object... args) {
        if (!isStatic()) {

    }

    private File findInProjectLocalRepository(Artifact artifact) {
        Path target = getArtifactPath(artifact);
        return Files.isRegularFile(target) ? target.toFile() : null;
    }

    /**
     * We are interested in project success events, in which case we call

    }

    public void setTarget_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda) {
        setTarget_Terms("target", opLambda, null);
    }

    public void setTarget_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda, OperatorCall<BsThumbnailQueueCA> aggsLambda) {
        setTarget_Terms("target", opLambda, aggsLambda);
    }