```console
$ pip install python-multipart
```

这是因为 **OAuth2** 使用“表单数据”来发送 `username` 和 `password`。

///

用下面的命令运行示例：

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

## 查看 { #check-it }

打开交互式文档：[http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs)。

你会看到类似这样的界面：

        // The trickled element is still after index.
        return new MoveDesc<>(actualLastElement, toTrickle);
      } else {
        // The trickled element is back before index, but the replaced element
        // has now been moved after index.
        return new MoveDesc<>(actualLastElement, changes.replaced);
      }
    }
    // Trickled element was after index to begin with, no adjustment needed.
    return changes;
  }

     * and then replacing the original file upon successful commit.
     */
    protected class StemmerOverrideUpdater implements Closeable {

        /** A flag indicating whether the changes have been committed. */
        protected boolean isCommit = false;

        /** The temporary file to write changes to. */
        protected File newFile;

        /** The writer for the temporary file. */

        if (sizeBeforeDeletion > 0) {
            logger.info("Successfully deleted {} crawling info log(s) using bulk delete", sizeBeforeDeletion);
        } else {
            logger.info("No crawling info logs to delete (may have been deleted by previous test)");
        }
    }

    throwIfInstanceOf(e, declaredType1);
    throwIfInstanceOf(e, declaredType2);
    throwIfUnchecked(e);
    throw new RuntimeException(e);
  }

  /**
   * Closes all {@code Closeable} instances that have been added to this {@code Closer}. If an
   * exception was thrown in the try block and passed to one of the {@code exceptionThrown} methods,
   * any exceptions thrown when attempting to close a closeable will be suppressed. Otherwise, the

        File pluginFile = (pluginArtifact != null) ? pluginArtifact.getFile() : null;
        if (pluginFile == null) {
            throw new IllegalStateException("plugin main artifact has not been resolved for " + getId());
        }

        if (pluginFile.isFile()) {
            try {
                return new URL("jar:" + pluginFile.toURI() + "!/" + descriptor).openStream();

```

Esto se debe a que **OAuth2** utiliza "form data" para enviar el `username` y `password`.

///

Ejecuta el ejemplo con:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

## Revisa { #check-it }

Ve a la documentación interactiva en: [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

```

Isso ocorre porque o **OAuth2** usa "form data" para enviar o `username` e o `password`.

///

Execute o exemplo com:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

## Verifique-o { #check-it }

            } catch (Exception cleanupError) {
                // Ignore cleanup errors
            }
            suggester.shutdown();
        }

        assertTrue("SuggesterException should have been thrown", exceptionThrown);
    }

    /**
     * Test switchIndex when update and search indices are the same.
     * Verifies that the method returns early without errors.
     */
    @Test

                        }
                    }
                    return null;
                }
                if (this.isDataFromNodeStatus) {
                    /*
                     * 'this' has been updated and should now
                     * have a real NetBIOS name
                     */
                    this.calledName = null;
                    return getHostName();
                }