import static java.lang.annotation.RetentionPolicy.CLASS;

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Annotates a "top-level" type-variable usage that takes its nullness from the type argument
 * supplied by the user of the class. For example, {@code Multiset.Entry.getElement()} returns

import static java.lang.annotation.RetentionPolicy.CLASS;

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Annotates a "top-level" type-variable usage that takes its nullness from the type argument
 * supplied by the user of the class. For example, {@code Multiset.Entry.getElement()} returns

# Configure Swagger UI { #configure-swagger-ui }

You can configure some extra <a href="https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/" class="external-link" target="_blank">Swagger UI parameters</a>.

To configure them, pass the `swagger_ui_parameters` argument when creating the `FastAPI()` app object or to the `get_swagger_ui_html()` function.

`swagger_ui_parameters` receives a dictionary with the configurations passed to Swagger UI directly.

    * Pydantic also allows representing it as a "ISO 8601 time diff encoding", <a href="https://docs.pydantic.dev/latest/concepts/serialization/#custom-serializers" class="external-link" target="_blank">see the docs for more info</a>.
* `frozenset`:
    * In requests and responses, treated the same as a `set`:
        * In requests, a list will be read, eliminating duplicates and converting it to a `set`.

    * Pydantic también permite representarlo como una "codificación de diferencia horaria ISO 8601", <a href="https://docs.pydantic.dev/latest/concepts/serialization/#custom-serializers" class="external-link" target="_blank">consulta la documentación para más información</a>.
* `frozenset`:
    * En requests y responses, tratado igual que un `set`:
        * En requests, se leerá una list, eliminando duplicados y convirtiéndola en un `set`.

Copy the example in a file `main.py`:

{* ../../docs_src/security/tutorial001_an_py39.py *}

## Run it { #run-it }

/// info

The <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a> package is automatically installed with **FastAPI** when you run the `pip install "fastapi[standard]"` command.

/target/...

target...

在這裡，你將會看到**不同主題**的範例或「如何使用」的指南。

大多數這些想法都是**獨立**的，在大多數情況下，你只需要研究那些直接適用於**你的專案**的東西。

如果有些東西看起來很有趣且對你的專案很有用的話再去讀它，否則你可能可以跳過它們。

/// tip

如果你想要以結構化的方式**學習 FastAPI**（推薦），請前往[教學 - 使用者指南](../tutorial/index.md){.internal-link target=_blank}逐章閱讀。

Er enthält auch, was sich geändert hat, wie Validierungen nun korrekter und strikter sind, mögliche Stolpersteine, usw.

Sie können ihn lesen, um besser zu verstehen, was sich geändert hat.

## Tests { #tests }