{!../../docs_src/python_types/tutorial009c.py!}
```

O paâmetro `name` é definido como `Optional[str]`, mas ele **não é opcional**, você não pode chamar a função sem o parâmetro:

```Python
say_hi()  # Oh, no, this throws an error! 😱
```

O parâmetro `name` **ainda é obrigatório** (não *opicional*) porque ele não possui um valor padrão. Mesmo assim, `name` aceita `None` como valor:

```Python
say_hi(name=None)  # This works, None is valid 🎉

     * 
     * This does not provide any actual downgrade protection if SMB1 is allowed.
     * 
     * It will also break connections with SMB2 servers that do not properly sign error responses.
     * 
     * @return whether to enforce the use of secure negotiation.
     */
    boolean isRequireSecureNegotiate ();


    /**
     * Enable port 139 failover
     * 

    // exception later. If more than one stream throws an exception, the later ones are added to the
    // first as suppressed exceptions. We don't catch Error on the grounds that it should be allowed
    // to propagate immediately.
    Exception exception = null;
    for (BaseStream<?, ?> stream : toClose) {
      try {
        stream.close();

      throw new UncheckedExecutionException(e);
    } catch (Exception e) {
      statsCounter.recordLoadException(ticker.read() - startTime);
      throw new ExecutionException(e);
    } catch (Error e) {
      statsCounter.recordLoadException(ticker.read() - startTime);
      throw new ExecutionError(e);
    }

    if (calculatedValue == null) {

    }

    /**
     * Creates a Type-3 message using the given raw Type-3 material.
     *
     * @param material The raw Type-3 material used to construct this message.
     * @throws IOException If an error occurs while parsing the material.
     */
    public Type3Message(byte[] material) throws IOException {
        parse(material);
    }

    /**
     * Returns the LanManager/LMv2 response.
     *

- Kubelet/stats: set INFO log level for stats not found in cadvisor memory cache error. ([#125656](https://github.com/kubernetes/kubernetes/pull/125656), [@gyuho](https://github.com/gyuho))

	apiRouter.Methods(http.MethodGet).Path(SlashSeparator + SlashSeparator).
		HandlerFunc(s3APIMiddleware(api.ListBucketsHandler))

	// If none of the routes match add default error handler routes
	apiRouter.NotFoundHandler = collectAPIStats("notfound", httpTraceAll(errorResponseHandler))
	apiRouter.MethodNotAllowedHandler = collectAPIStats("methodnotallowed", httpTraceAll(methodNotAllowedHandler("S3")))
}

* You can ask them to provide a <a href="https://stackoverflow.com/help/minimal-reproducible-example" class="external-link" target="_blank">minimal, reproducible, example</a>, that you can **copy-paste** and run locally to see the same error or behavior they are seeing, or to understand their use case better.

  private static AssertionError sanityError(
      Class<?> cls, List<String> explicitTestNames, String description, Throwable e) {
    String message =
        String.format(
            Locale.ROOT,
            "Error in automated %s of %s\n"
                + "If the class is better tested explicitly, you can add %s() to %sTest",
            description,
            cls,
            explicitTestNames.get(0),

errors.property_type_long={0}は数値です。
errors.property_type_float={0}は数値です。
errors.property_type_double={0}は数値です。
errors.property_type_date={0}は日付です。

errors.storage_file_upload_failure={0} のアップロードに失敗しました。
errors.storage_file_not_found=対象のファイルはストレージ内にありません。
errors.storage_file_download_failure={0} のダウンロードに失敗しました。
errors.storage_access_error=ストレージアクセスエラー: {0}
errors.storage_no_upload_file=アップロードするファイルを指定してください。