from fastapi import Body, FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None


class User(BaseModel):
    username: str
    full_name: str | None = None


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item, user: User, importance: int = Body()):

    return "fakehashed" + password


oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


class User(BaseModel):
    username: str
    email: str | None = None
    full_name: str | None = None
    disabled: bool | None = None


class UserInDB(User):
    hashed_password: str


def get_user(db, username: str):
    if username in db:
        user_dict = db[username]

        // Default test task should run only unit tests
        maybeConfigure(project.getTasks(), "test", Test.class, task -> task.include("**/*Tests.class"));

        // none of this stuff is applicable to the `:buildSrc` project tests
        File heapdumpDir = new File(project.getBuildDir(), "heapdump");

        project.getTasks().withType(Test.class).configureEach(test -> {

例如，你可以宣告某個值可以是 `str` 或 `None`：

```python
from typing import Union


def say_hi(name: Union[str, None]):
        print(f"Hi {name}!")
```

在 `typing` 中也有用 `Optional` 宣告某個值可以是 `None` 的速記法。

以下是我個人（非常主觀）的建議：

* 🚨 避免使用 `Optional[SomeType]`
* 改為 ✨ 使用 `Union[SomeType, None]` ✨。

    username: str
    password: str
    email: EmailStr
    full_name: str | None = None


class UserOut(BaseModel):
    username: str
    email: EmailStr
    full_name: str | None = None


class UserInDB(BaseModel):
    username: str
    hashed_password: str
    email: EmailStr
    full_name: str | None = None


def fake_password_hasher(raw_password: str):
    return "supersecret" + raw_password

set FILE_ARG=
:arg_loop
if "%~1" == "-f" (
  set "FILE_ARG=%~2"
  shift
  goto process_file_arg
)
if "%~1" == "--file" (
  set "FILE_ARG=%~2"
  shift
  goto process_file_arg
)
@REM If none of the above, skip the argument
shift
if not "%~1" == "" (
  goto arg_loop
) else (
  goto findBaseDir
)

:process_file_arg
if "%FILE_ARG%" == "" (
  goto findBaseDir
)

     * build.gradle file because that is appropriate for Elasticsearch's docs
     * directory.
     */
    @InputFiles
    ConfigurableFileTree docs

    /**
     * Substitutions done on every snippet's contents.
     */
    @Input
    Map<String, String> defaultSubstitutions = [:]

    @TaskAction
    void executeTask() {
        /*

                return "auto";
            }

            @Override
            public String getSsoType() {
                return "none";
            }
        });
        final OsddHelper osddHelper = new OsddHelper();
        osddHelper.setOsddPath("osdd/none.xml");
        osddHelper.init();
        assertFalse(osddHelper.hasOpenSearchFile());
    }

    @Test
    public void test_init_disabled() {

    ) {
        val failures = projects
            .filter { (path, _) -> !computedTargetRuntimes.containsKey(path) }
            .filter { (path, _) -> projects.none { (_, value) -> value.details.dependencies.contains(path) } }
            .map { (path, info) -> "Project $path: ${info.buildFile.asClickableFileUrl()}" }

        if (failures.isNotEmpty()) {

//// tab | Тест

Вот некоторые элементы, обёрнутые в HTML-элементы "abbr" (часть выдумана):

### abbr даёт полную расшифровку { #the-abbr-gives-a-full-phrase }

* <abbr title="Getting Things Done - Как привести дела в порядок">GTD</abbr>
* <abbr title="less than - меньше чем"><code>lt</code></abbr>
* <abbr title="XML Web Token - XML веб‑токен">XWT</abbr>