* `Decimal`:
    * 标准的 Python `Decimal`。
    * 在请求和响应中被当做 `float` 一样处理。
* 您可以在这里检查所有有效的pydantic数据类型: <a href="https://docs.pydantic.dev/latest/concepts/types/" class="external-link" target="_blank">Pydantic data types</a>.

## 例子

下面是一个*路径操作*的示例，其中的参数使用了上面的一些类型。

=== "Python 3.10+"

    ```Python hl_lines="1  3  12-16"
    {!> ../../../docs_src/extra_data_types/tutorial001_an_py310.py!}
    ```

            switch (next) {
                case XMLStreamReader.SPACE:
                case XMLStreamReader.COMMENT:
                case XMLStreamReader.PROCESSING_INSTRUCTION:
                case XMLStreamReader.CDATA:
                case XMLStreamReader.CHARACTERS:
                    continue;
                case XMLStreamReader.START_ELEMENT:
                case XMLStreamReader.END_ELEMENT:
                    return next;

            switch (next) {
                case XMLStreamReader.SPACE:
                case XMLStreamReader.COMMENT:
                case XMLStreamReader.PROCESSING_INSTRUCTION:
                case XMLStreamReader.CDATA:
                case XMLStreamReader.CHARACTERS:
                    continue;
                case XMLStreamReader.START_ELEMENT:
                case XMLStreamReader.END_ELEMENT:
                    return next;

          (OffPtr <t.FieldType(0).PtrTo()> [0] dst)
            f0 mem))))

// Putting struct{*byte} and similar into direct interfaces.
(IMake _typ (StructMake1 val)) => (IMake _typ val)
(StructSelect [0] (IData x)) => (IData x)

// un-SSAable values use mem->mem copies
(Store {t} dst (Load src mem) mem) && !CanSSA(t) =>
	(Move {t} [t.Size()] dst src mem)
(Store {t} dst (Load src mem) (VarDef {x} mem)) && !CanSSA(t) =>