```Python hl_lines="3  5-6"
{
    "name": "Baz",
    "description": None,
    "price": 50.2,
    "tax": 10.5,
    "tags": []
}
```

O FastAPI é inteligente o suficiente (na verdade, o Pydantic é inteligente o suficiente) para perceber que, embora `description`, `tax` e `tags` tenham os mesmos valores que os padrões, eles foram definidos explicitamente (em vez de retirados dos padrões).

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

from fastapi import Depends, FastAPI, Security
from fastapi.security import APIKeyHeader
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()

api_key = APIKeyHeader(name="key", description="An API Key Header")


class User(BaseModel):
    username: str


def get_current_user(oauth_header: str = Security(api_key)):
    user = User(username=oauth_header)
    return user

    <version>999.0.0-HEAD-android-SNAPSHOT</version>
  </parent>
  <artifactId>guava-testlib</artifactId>
  <name>Guava Testing Library</name>
  <description>
    Guava testlib is a set of java classes used for more convenient
    unit testing - particularly to assist the tests for Guava itself.
  </description>
  <dependencies>
    <dependency>
      <groupId>org.jspecify</groupId>
      <artifactId>jspecify</artifactId>
    </dependency>

from fastapi import FastAPI, Security
from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
from fastapi.testclient import TestClient

app = FastAPI()

security = HTTPBearer(description="HTTP Bearer token scheme")


@app.get("/users/me")
def read_current_user(credentials: HTTPAuthorizationCredentials = Security(security)):
    return {"scheme": credentials.scheme, "credentials": credentials.credentials}

from fastapi import FastAPI, Security
from fastapi.security import HTTPAuthorizationCredentials, HTTPDigest
from fastapi.testclient import TestClient

app = FastAPI()

security = HTTPDigest(description="HTTPDigest scheme")


@app.get("/users/me")
def read_current_user(credentials: HTTPAuthorizationCredentials = Security(security)):
    return {"scheme": credentials.scheme, "credentials": credentials.credentials}


client = TestClient(app)

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

Наприклад, ця модель вище оголошує JSON "`об'єкт`" (або Python `dict`), як:

```JSON
{
    "name": "Foo",
    "description": "An optional description",
    "price": 45.2,
    "tax": 3.5
}
```

...оскільки `description` і `tax` є необов'язковими (зі значенням за замовчуванням `None`), цей JSON "`об'єкт`" також буде дійсним:

```JSON
{
    "name": "Foo",
    "price": 45.2
}

    <artifactId>maven</artifactId>
    <version>4.0.0-alpha-1-SNAPSHOT</version>
  </parent>

  <artifactId>maven-model</artifactId>

  <name>Maven Model</name>
  <description>Model for Maven POM (Project Object Model)</description>

  <dependencies>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-model</artifactId>
      <version>4.0.0-alpha-1-SNAPSHOT</version>

  <artifactId>maven-clean-plugin</artifactId>
  <version>0.1</version>
  <packaging>maven-plugin</packaging>

  <name>Maven Integration Test Plugin</name>
  <description>
    A test plugin to assist testing of Maven core.
  </description>
  <inceptionYear>2009</inceptionYear>

  <distributionManagement>
    <repository>
      <id>maven-core-it</id>
      <url>file:///${basedir}/repo</url>
    </repository>