# 并发 async / await

有关路径操作函数的 `async def` 语法以及异步代码、并发和并行的一些背景知识。

## 赶时间吗？

<abbr title="too long; didn't read(长文警告)"><strong>TL;DR:</strong></abbr>

如果你正在使用第三方库，它们会告诉你使用 `await` 关键字来调用它们，就像这样：

```Python
results = await some_library()
```

然后，通过 `async def` 声明你的 *路径操作函数*：

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

/// note

import org.apache.maven.plugin.descriptor.Parameter;
import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
import org.eclipse.aether.repository.RemoteRepository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static org.apache.maven.api.Lifecycle.AFTER;

# FastAPI

<style>
.md-content .md-typeset h1 { display: none; }
</style>

<p align="center">
  <a href="https://fastapi.tiangolo.com"><img src="https://fastapi.tiangolo.com/img/logo-margin/logo-teal.png" alt="FastAPI"></a>
</p>
<p align="center">
    FastAPI framework, high performance, easy to learn, fast to code, ready for production
</p>
<p align="center">

		if rec.Code != testCase.expectedRespStatus {
			t.Errorf("Test %d: MinIO %s: Expected the response status to be `%d`, but instead found `%d`", i, instanceType, testCase.expectedRespStatus, rec.Code)
		}

		// read the response body.
		actualContent, err = io.ReadAll(rec.Body)
		if err != nil {
			t.Fatalf("Test %d : MinIO %s: Failed parsing response body: <ERROR> %v", i, instanceType, err)
		}

pkg io, func NopCloser(Reader) ReadCloser
pkg io, func ReadAll(Reader) ([]uint8, error)
pkg io, type ReadSeekCloser interface { Close, Read, Seek }
pkg io, type ReadSeekCloser interface, Close() error
pkg io, type ReadSeekCloser interface, Read([]uint8) (int, error)
pkg io, type ReadSeekCloser interface, Seek(int64, int) (int64, error)
pkg io, var Discard Writer
pkg io/fs, const ModeAppend = 1073741824

	c.Assert(err, nil)
	// Since only part of the object is requested, expecting response status to be http.StatusPartialContent .
	c.Assert(response.StatusCode, http.StatusPartialContent)
	// read the downloaded content from the response body.
	getContent, err := io.ReadAll(response.Body)
	c.Assert(err, nil)

	// Compare putContent and getContent.
	c.Assert(string(getContent), putContent[10485750:10485770])

			if client == nil {
				return errPeerNotReachable
			}
			return client.LoadServiceAccount(ctx, accessKey)
		}, idx, *client.host)
	}
	return ng.Wait()
}

// BackgroundHealStatus - returns background heal status of all peers
func (sys *NotificationSys) BackgroundHealStatus(ctx context.Context) ([]madmin.BgHealState, []NotificationPeerErr) {
	ng := WithNPeers(len(sys.peerClients))

	CLZ	R1, R2

//
// MOVW
//
//	LTYPE3 cond gen ',' gen
//	{
//		outcode($1, $2, &$3, 0, &$5);
//	}
	MOVW.S	R1, R2
	MOVW	$1, R2
	MOVW.S	R1<<R2, R3

//
// B/BL
//
//	LTYPE4 cond comma rel
//	{
//		outcode($1, $2, &nullgen, 0, &$4);
//	}
	B.EQ	1(PC) // BEQ 1(PC)

//	LTYPE4 cond comma nireg
//	{
//		outcode($1, $2, &nullgen, 0, &$4);
//	}
	BEQ	2(PC)
	B	foo(SB) // JMP foo(SB)
	BEQ	2(PC)

and process to perform `mc admin service restart alias/`. ### Upgrade Checklist - Test all upgrades in a lower environment (DEV, QA, UAT) before applying to production. Performing blind upgrades in production environments carries significant risk. - Read the release notes for MinIO *before* performing any upgrade, there is no forced requirement to upgrade to latest release upon every release. Some release may not be relevant to your setup, avoid upgrading production environments unnecessarily. - If...

		// Fan-out requires no copying, and must be carried from original source
		// https://en.wikipedia.org/wiki/Copy_protection so the incoming stream
		// is always going to be in-memory as we cannot re-read from what we
		// wrote to disk - since that amounts to "copying" from a "copy"
		// instead of "copying" from source, we need the stream to be seekable
		// to ensure that we can make fan-out calls concurrently.