TF_Status status;
    // Let this custom device choose the device to pin this op on if it
    // implements the pinning function.
    if (device_.shall_pin_to_this_device != nullptr) {
      return device_.shall_pin_to_this_device(tensorflow::wrap(op), &status);
    }
    return errors::Unimplemented("No custom device pinning implementation.");
  }

 private:
  TFE_Context* context_;

Imagine you develop an app that allows creating invoices.

These invoices will have an `id`, `title` (optional), `customer`, and `total`.

The user of your API (an external developer) will create an invoice in your API with a POST request.

Then your API will (let's imagine):

* Send the invoice to some customer of the external developer.
* Collect the money.
* Send a notification back to the API user (the external developer).

Und da die `Response` häufig zum Setzen von Headern und Cookies verwendet wird, stellt **FastAPI** diese auch unter `fastapi.Response` bereit.

///

## Benutzerdefinierte Header { #custom-headers }

Beachten Sie, dass benutzerdefinierte proprietäre Header [mit dem Präfix `X-`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers) hinzugefügt werden können.

            assertEquals(times[2], info.getLastWriteTime());
        }
    }

    @Test
    @DisplayName("Test custom implementation of BasicFileInformation")
    void testCustomImplementation() {
        // Given - Create a custom implementation
        BasicFileInformation customImpl = new BasicFileInformation() {
            @Override
            public int getAttributes() {

Sie könnten ein `dict`, eine `list`, usw. übergeben.

Diese werden von **FastAPI** automatisch gehandhabt und in JSON konvertiert.

///

## Benutzerdefinierte Header hinzufügen { #add-custom-headers }

Es gibt Situationen, in denen es nützlich ist, dem HTTP-Error benutzerdefinierte Header hinzuzufügen. Zum Beispiel in einigen Sicherheitsszenarien.

///

{* ../../docs_src/dependencies/tutorial008b_an_py310.py hl[18:22,31] *}

Exception yakalayıp buna göre özel bir response oluşturmak istiyorsanız bir [Custom Exception Handler](../handling-errors.md#install-custom-exception-handlers) oluşturun.

## `yield` ve `except` ile Dependency'ler { #dependencies-with-yield-and-except }

        assertNotNull(retry.getContext());
    }

    @Test
    @DisplayName("Should format message correctly")
    void testMessageFormatting() {
        // With custom message
        exception = new SmbOperationException(SmbOperationException.ErrorCode.FILE_EXISTS, "document.pdf already exists");
        assertTrue(exception.getMessage().contains("FILE_EXISTS"));

接下来我会告诉你如何改进。🤓

## 自定义操作 ID 与更好的方法名 { #custom-operation-ids-and-better-method-names }

你可以**修改**这些操作 ID 的**生成**方式，使之更简单，从而在客户端中得到**更简洁的方法名**。

在这种情况下，你需要用其他方式确保每个操作 ID 依然是**唯一**的。

例如，你可以确保每个*路径操作*都有一个标签，然后基于**标签**和*路径操作***名称**（函数名）来生成操作 ID。

### 自定义唯一 ID 生成函数 { #custom-generate-unique-id-function }

FastAPI 为每个*路径操作*使用一个**唯一 ID**，它既用于**操作 ID**，也用于请求或响应里任何需要的自定义模型名称。

    public String handlerName;

    /** Parameters passed to the data handler */
    @CustomSize(maxKey = "form.admin.max.input.size")
    public String handlerParameter;

    /** Script for custom data processing logic */
    @CustomSize(maxKey = "form.admin.max.input.size")
    public String handlerScript;

    /** Boost value for documents from this data source */
    @Required
    @ValidateTypeFailure

0!==i.indexOf("-")||(h["data-validation-allowing"]+=",negative"),(j.indexOf(".")>-1||i.indexOf(".")>-1||k.indexOf(".")>-1)&&(h["data-validation-allowing"]+=",float")):h["data-validation-allowing"]+=",float,negative"}if(e.attr("pattern")&&(b.push("custom"),h["data-validation-regexp"]=e.attr("pattern")),e.attr("maxlength")&&(b.push("length"),h["data-validation-length"]="max"+e.attr("maxlength")),!c&&e.attr("list")){var l=[],m=a("#"+e.attr("list"));if(m.find("option").each(function(){l.push(a(this)...