"paths": {
                "/a/{id}": {
                    "get": {
                        "responses": {
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

from fastapi import FastAPI, Request

app = FastAPI(
    servers=[
        {"url": "https://stag.example.com", "description": "Staging environment"},
        {"url": "https://prod.example.com", "description": "Production environment"},
    ],
    root_path="/api/v1",
)


@app.get("/app")
def read_main(request: Request):

RuntimeException { public void CommandLineArgumentE(String); } org/gradle/cli/CommandLineOption.class package org.gradle.cli; public final class CommandLineOption { public final java.util.HashSet options; public Class argumentType; public String description; public final java.util.HashSet groupWith; public void CommandLineOption(java.util.List); public final java.util.HashSet getOptions(); } org/gradle/cli/CommandLineParser$AfterOptions.class package org.gradle.cli; public final class CommandLineParser$AfterOptions...

```JSON hl_lines="2"
{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,
        "tax": 3.2
    }
}
```

şunun yerine:

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2
}
```

## Özet { #recap }

  <modelVersion>4.0.0</modelVersion>

  <groupId>com.squareup.okhttp3</groupId>
  <artifactId>maven-tests</artifactId>
  <version>1.0.0-SNAPSHOT</version>

  <name>maven-tests</name>
  <description>A simple maven-test.</description>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>21</maven.compiler.source>
    <maven.compiler.target>21</maven.compiler.target>

{
    "responses": {
        "404": {
            "description": "Additional Response",
            "content": {
                "application/json": {
                    "schema": {
                        "$ref": "#/components/schemas/Message"
                    }
                }
            }
        },
        "200": {
            "description": "Successful Response",
            "content": {

                        "responses": {
                            "200": {
                                "description": "Successful Response",
                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {

{
    "responses": {
        "404": {
            "description": "Additional Response",
            "content": {
                "application/json": {
                    "schema": {
                        "$ref": "#/components/schemas/Message"
                    }
                }
            }
        },
        "200": {
            "description": "Successful Response",
            "content": {

**FastAPI** 对此的支持与使用普通字符串相同：

{* ../../docs_src/path_operation_configuration/tutorial002b_py310.py hl[1,8:10,13,18] *}

## 摘要和描述 { #summary-and-description }

可以添加 `summary` 和 `description`：

{* ../../docs_src/path_operation_configuration/tutorial003_py310.py hl[17:18] *}

## 从 docstring 获取描述 { #description-from-docstring }

描述内容比较长且占用多行时，可以在函数的 <dfn title="作为函数内部的第一个表达式（不赋给任何变量）的多行字符串，用于文档用途">docstring</dfn> 中声明*路径操作*的描述，**FastAPI** 会从中读取。

```json
{"name": "Plumbus", "description": "A multi-purpose household device."}
{"name": "Portal Gun", "description": "A portal opening device."}
{"name": "Meeseeks Box", "description": "A box that summons a Meeseeks."}
```