///

{* ../../docs_src/extra_models/tutorial003_py310.py hl[1,14:15,18:20,33] *}

### Python 3.10の`Union` { #union-in-python-3-10 }

この例では、引数`response_model`の値として`Union[PlaneItem, CarItem]`を渡しています。

**型アノテーション**に書くのではなく、**引数の値**として渡しているため、Python 3.10でも`Union`を使う必要があります。

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