val ANY_VALUE =
    object : DerAdapter<AnyValue> {
      override fun matches(header: DerHeader): Boolean = true

      override fun fromDer(reader: DerReader): AnyValue {
        reader.read("ANY") { header ->
          val bytes = reader.readUnknown()
          return AnyValue(
            tagClass = header.tagClass,
            tag = header.tag,
            constructed = header.constructed,

它将函数转化为所谓的“**异步上下文管理器**”。

{* ../../docs_src/events/tutorial003_py310.py hl[1,13] *}

在 Python 中，**上下文管理器**是一个你可以在 `with` 语句中使用的东西，例如，`open()` 可以作为上下文管理器使用。

```Python
with open("file.txt") as file:
    file.read()
```

Python 的最近几个版本也有了一个**异步上下文管理器**，你可以通过 `async with` 来使用：

```Python
async with lifespan(app):
    await do_stuff()
```

{* ../../docs_src/events/tutorial003_py310.py hl[1,13] *}

파이썬에서 **컨텍스트 매니저**는 `with` 문에서 사용할 수 있는 것입니다. 예를 들어, `open()`은 컨텍스트 매니저로 사용할 수 있습니다:

```Python
with open("file.txt") as file:
    file.read()
```

최근 버전의 파이썬에는 **비동기 컨텍스트 매니저**도 있습니다. 이를 `async with`와 함께 사용합니다:

```Python
async with lifespan(app):
    await do_stuff()
```

ranzan.saitama.jp
rar.ve
ras.ru
rauma.no
ravendb.cloud
ravendb.community
ravendb.run
ravenna.it
ravpage.co.il
rawa-maz.pl
rc.it
rdy.jp
re
re.it
re.kr
read
read-books.org
readmyblog.org
readthedocs-hosted.com
readthedocs.io
readymade.jp
realestate
realestate.pl
realm.cz
realtor
realty
rebun.hokkaido.jp
rec.br
rec.nf
rec.ro

<code>E</code>
[<a href="#Go_1.18">Go 1.18</a>].
</p>

<pre>
type Reader interface {
	Read(p []byte) (n int, err error)
	Close() error
}

type Writer interface {
	Write(p []byte) (n int, err error)
	Close() error
}

// ReadWriter's methods are Read, Write, and Close.
type ReadWriter interface {
	Reader  // includes methods of Reader in ReadWriter's method set

「情境管理器」是那些你可以在 `with` 陳述式中使用的 Python 物件。

例如，[你可以用 `with` 來讀取檔案](https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files)：

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

在底層，`open("./somefile.txt")` 會建立一個稱為「情境管理器」的物件。

當 `with` 區塊結束時，它會確保關閉檔案，即使發生了例外也一樣。

當你建立一個含 `yield` 的相依時，**FastAPI** 會在內部為它建立一個情境管理器，並與其他相關工具結合。

* client-go: shortens refresh period for token files to 1 minute to ensure auto-rotated projected service account tokens are read frequently enough. ([#72437](https://github.com/kubernetes/kubernetes/pull/72437), [@liggitt](https://github.com/liggitt))

///

### O arquivo `.env` { #the-env-file }

Você poderia ter um arquivo `.env` com:

```bash
ADMIN_EMAIL="******@****.***"
APP_NAME="ChimichangApp"
```

### Ler configurações do `.env` { #read-settings-from-env }

E então atualizar seu `config.py` com:

{* ../../docs_src/settings/app03_an_py310/config.py hl[9] *}

/// tip | Dica

	} else {
		c.iamUsersMap[key] = u
	}
	c.updatedAt = time.Now()
	return nil
}

// IAMStorageAPI defines an interface for the IAM persistence layer
type IAMStorageAPI interface {
	// The role of the read-write lock is to prevent go routines from
	// concurrently reading and writing the IAM storage. The (r)lock()
	// functions return the iamCache. The cache can be safely written to
	// only when returned by `lock()`.

racing

// radio : European Broadcasting Union (EBU)
// https://www.iana.org/domains/root/db/radio.html
radio

// read : Amazon Registry Services, Inc.
// https://www.iana.org/domains/root/db/read.html
read

// realestate : dotRealEstate LLC
// https://www.iana.org/domains/root/db/realestate.html
realestate

// realtor : Real Estate Domains LLC