|
   | NOTE: For profiles defined in the settings.xml, you are restricted to specifying only artifact
   |       repositories, plugin repositories, and free-form properties to be used as configuration
   |       variables for plugins in the POM.
   |
   |-->
  <profiles>
    <!-- profile

不過若只執行 `pip install fastapi`，預設不會包含 `python-multipart`。

若要手動安裝，請先建立並啟用一個[虛擬環境](../../virtual-environments.md)，接著執行：

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

因為 OAuth2 會以「form data」傳送 `username` 與 `password`。

///

用以下指令執行範例：

<div class="termy">

```console
$ fastapi dev

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

Це тому, що **OAuth2** використовує «form data» для надсилання `username` та `password`.

///

Запустіть приклад:

<div class="termy">

```console
$ fastapi dev

,n.always(function(){void 0===i?ce(ie).removeProp(r):ie[r]=i,e[r]&&(e.jsonpCallback=t.jsonpCallback,Kt.push(r)),o&&v(i)&&i(o[0]),o=i=void 0}),"script"}),le.createHTMLDocument=((Jt=C.implementation.createHTMLDocument("").body).innerHTML="<form></form><form></form>",2===Jt.childNodes.length),ce.parseHTML=function(e,t,n){return"string"!=typeof e?[]:("boolean"==typeof t&&(n=t,t=!1),t||(le.createHTMLDocument?((r=(t=C.implementation.createHTMLDocument("")).createElement("base")).href=C.location.href,t...

  abstract void describeAsUpperBound(StringBuilder sb);

  abstract @Nullable C leastValueAbove(DiscreteDomain<C> domain);

  abstract @Nullable C greatestValueBelow(DiscreteDomain<C> domain);

  /*
   * The canonical form is a BelowValue cut whenever possible, otherwise ABOVE_ALL, or
   * (only in the case of types that are unbounded below) BELOW_ALL.
   */
  Cut<C> canonical(DiscreteDomain<C> domain) {
    return this;
  }

        rollback();
    }

    // ===================================================================================
    //                                                                           Form File
    //                                                                           =========
    protected static class ActionMultipartFormFile implements MultipartFormFile, Serializable {

    } catch (NoSuchMethodException | IllegalAccessException probablyBeforeJava9OrAndroid28) {
      /*
       * It's theoretically possible for Reference.reachabilityFence to exist under older VMs in an
       * inaccessible form.
       */
      return false;
    } catch (InvocationTargetException e) {
      /*
       * It's theoretically possible for Reference.reachabilityFence to exist under older VMs but

            if (!visited.add(a.getGroupId() + ':' + a.getArtifactId() + ':' + a.getBaseVersion())) {
                RepositoryException exception =
                        new RepositoryException("Artifact relocations form a cycle: " + visited);
                invalidDescriptor(session, trace, a, exception);
                if ((getPolicy(session, a, request) & ArtifactDescriptorPolicy.IGNORE_INVALID) != 0) {
                    return null;

    }

    @Override
    public InetAddress toInetAddress() throws UnknownHostException {
        return getInetAddress();
    }

    /**
     * Returns this IP adress as a {@link java.lang.String} in the form "%d.%d.%d.%d".
     *
     * @return string representation of the IP address
     */

    @Override
    public String getHostAddress() {

## Pydantic-Modelle { #pydantic-models }

[Pydantic](https://docs.pydantic.dev/) ist eine Python-Bibliothek für die Validierung von Daten.

Sie deklarieren die „Form“ der Daten als Klassen mit Attributen.

Und jedes Attribut hat einen Typ.