{* ../../docs_src/events/tutorial003_py310.py hl[14:19] *}

함수의 첫 번째 부분, 즉 `yield` 이전의 코드는 애플리케이션이 시작되기 **전에** 실행됩니다.

그리고 `yield` 이후의 부분은 애플리케이션이 종료된 **후에** 실행됩니다.

### 비동기 컨텍스트 매니저 { #async-context-manager }

확인해 보면, 함수는 `@asynccontextmanager`로 데코레이션되어 있습니다.

이는 함수를 "**비동기 컨텍스트 매니저**"라고 불리는 것으로 변환합니다.

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

Multi-channel enables using multiple network connections for improved performance and reliability.

#### 3.1 Core Multi-Channel Infrastructure
```
Package: jcifs.internal.smb2.multichannel
├── ChannelManager.java           - Manage multiple channels per session
├── ChannelBinding.java           - Channel binding and security
├── ChannelSequence.java          - Request sequencing across channels
├── NetworkInterfaceInfo.java     - Network interface discovery

            assertFalse(echoResponse.isAsyncHandled());
        }
    }

    @Nested
    @DisplayName("Expiration Tests")
    class ExpirationTests {

        @Test
        @DisplayName("Should manage expiration time")
        void testExpiration() {
            assertNull(echoResponse.getExpiration());

            Long expiration = System.currentTimeMillis() + 10000L;

#include "tensorflow/core/framework/tensor_reference.h"
#include "tensorflow/core/platform/logging.h"

namespace tensorflow {

namespace {

// Managing context for the DLManagedTensor, will manage the lifetime of
// DLManagedTensor. When calling DLManagedTensor::deleter, it will notify the
// original framework of destruction, and this context will be deleted also.
struct TfDlManagedTensorCtx {
  TensorReference reference;

 * called certificate authorities (CAs).
 *
 * Browsers and other HTTP clients need a set of trusted root certificates to authenticate their
 * peers. Sets of root certificates are managed by either the HTTP client (like Firefox), or the
 * host platform (like Android). In July 2018 Android had 134 trusted root certificates for its HTTP
 * clients to trust.
 *

public certificate from .Values.tls.certSecret. trustedCertsSecret: "" ## Enable persistence using Persistent Volume Claims ## ref: http://kubernetes.io/docs/user-guide/persistent-volumes/ ## persistence: enabled: true annotations: {} ## A manually managed Persistent Volume and Claim ## Requires persistence.enabled: true ## If defined, PVC must be created manually before volume will be bound existingClaim: "" ## minio data Persistent Volume Storage Class ## If defined, storageClassName: <storageClass>...

public certificate from .Values.tls.certSecret. trustedCertsSecret: "" ## Enable persistence using Persistent Volume Claims ## ref: http://kubernetes.io/docs/user-guide/persistent-volumes/ ## persistence: enabled: true annotations: {} ## A manually managed Persistent Volume and Claim ## Requires persistence.enabled: true ## If defined, PVC must be created manually before volume will be bound existingClaim: "" ## minio data Persistent Volume Storage Class ## If defined, storageClassName: <storageClass>...

public certificate from .Values.tls.certSecret. trustedCertsSecret: "" ## Enable persistence using Persistent Volume Claims ## ref: http://kubernetes.io/docs/user-guide/persistent-volumes/ ## persistence: enabled: true annotations: {} ## A manually managed Persistent Volume and Claim ## Requires persistence.enabled: true ## If defined, PVC must be created manually before volume will be bound existingClaim: "" ## minio data Persistent Volume Storage Class ## If defined, storageClassName: <storageClass>...

	if err != nil {
		return err
	}

	_, err = objAPI.PutObject(ctx, minioMetaBucket, tierConfigPath, pr, *opts)
	return err
}

// NewTierConfigMgr - creates new tier configuration manager,
func NewTierConfigMgr() *TierConfigMgr {
	return &TierConfigMgr{
		drivercache: make(map[string]WarmBackend),
		Tiers:       make(map[string]madmin.TierConfig),
	}
}

首先要注意的是，我们定义了一个带有 `yield` 的异步函数。这与带有 `yield` 的依赖项非常相似。

{* ../../docs_src/events/tutorial003_py310.py hl[14:19] *}

这个函数在 `yield` 之前的部分，会在应用启动前执行。

剩下的部分在 `yield` 之后，会在应用完成后执行。

### 异步上下文管理器 { #async-context-manager }

如你所见，这个函数有一个装饰器 `@asynccontextmanager`。

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。