# 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

		t.Errorf("mismatch: %s", cmp.Diff(expectedRows, rows))
	}
}

type stringTestList []struct {
	name, got, exp string
}

func TestTranslateTimestampSince(t *testing.T) {
	tl := stringTestList{
		{"a while from now", translateTimestampSince(metav1.Time{Time: time.Now().Add(2.1e9)}), "<invalid>"},
		{"almost now", translateTimestampSince(metav1.Time{Time: time.Now().Add(1.9e9)}), "0s"},

     * pt_BR=pt-br<br>
     * ro=ro<br>
     * ru=ru<br>
     * si=si<br>
     * sq=sq<br>
     * sv=sv<br>
     * ta=ta<br>
     * te=te<br>
     * th=th<br>
     * tl=tl<br>
     * tr=tr<br>
     * uk=uk<br>
     * ur=ur<br>
     * vi=vi<br>
     * zh-cn=zh-cn<br>
     * zh_CN=zh-cn<br>
     * zh-tw=zh-tw<br>
     * zh_TW=zh-tw<br>
     * zh=zh<br>

p-locate@^5.0.0:
  version "5.0.0"
  resolved "https://registry.yarnpkg.com/p-locate/-/p-locate-5.0.0.tgz#83c8315c6785005e3bd021839411c9e110e6d834"
  integrity sha512-LaNjtRWUBY++zB5nE/NwcaoMylSPk+S+ZHNB1TzdbMJMny6dynpAGt7X/tl/QYq3TIeE6nxHppbo2LGymrG5Pw==
  dependencies:
    p-limit "^3.0.2"

p-try@^2.0.0:
  version "2.2.0"
  resolved "https://registry.yarnpkg.com/p-try/-/p-try-2.2.0.tgz#cb2868540e313d61de58fafbe35ce9004d5540e6"

e[0]=="string"){let t=e[0].trim();if(t.includes(":")||t==="selector"||t==="not selector")return[tl.stringify(e)]}return e.map(t=>this.normalize(t))}add(e,t){return e.map(r=>{if(this.isProp(r)){let n=this.prefixed(r[0]);return n.length>1?this.convert(n):r}return typeof r=="object"?this.add(r,t):r})}process(e){let t=tl.parse(e.params);t=this.normalize(t),t=this.remove(t,e.params),t=this.add(t,e.params),t=this.cleanBrackets(t),e.params=tl.stringify(t)}disabled(e){if(!this.all.options.grid&&(e.prop==="display"&&e.val...

# 並行処理と async / await

*path operation 関数*のための `async def` に関する詳細と非同期 (asynchronous) コード、並行処理 (Concurrency)、そして、並列処理 (Parallelism) の背景について。

## 急いでいますか？

<abbr title="too long; didn't read (長すぎて読めない人のための要約という意味のスラング)"><strong>TL;DR:</strong></abbr>

次のような、`await` を使用して呼び出すべきサードパーティライブラリを使用している場合:

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

以下の様に `async def` を使用して*path operation 関数*を宣言します。

```Python hl_lines="2"
@app.get('/')

			t.Errorf("for %s expected Content-Length header of %q; got %q", url, expected, cl)
		}
		if tl, expected := len(res.TransferEncoding), 0; tl != expected {
			t.Errorf("for %s expected len(res.TransferEncoding) of %d; got %d (%v)",
				url, expected, tl, res.TransferEncoding)
		}
		res.Body.Close()
	}

	// Verify that ErrContentLength is returned

edu.tj
go.tj
gov.tj
int.tj
mil.tj
name.tj
net.tj
nic.tj
org.tj
test.tj
web.tj

// tk : https://en.wikipedia.org/wiki/.tk
tk

// tl : https://en.wikipedia.org/wiki/.tl
tl
gov.tl

// tm : http://www.nic.tm/local.html
tm
com.tm
co.tm
org.tm
net.tm
nom.tm
gov.tm
mil.tm
edu.tm

// tn : http://www.registre.tn/fr/

gov.mu gov.mv gov.mw gov.my gov.mz gov.nc.tr gov.ng gov.nl gov.nr gov.om gov.ph gov.pk gov.pl gov.pn gov.pr gov.ps gov.pt gov.py gov.qa gov.rs gov.ru gov.rw gov.sa gov.sb gov.sc gov.scot gov.sd gov.sg gov.sh gov.sl gov.so gov.ss gov.sx gov.sy gov.tj gov.tl gov.tm gov.tn gov.to gov.tr gov.tt gov.tw gov.ua gov.uk gov.vc gov.ve gov.vn gov.ws gov.ye gov.za gov.zm gov.zw government.aero govt.nz gp gq gr gr.com gr.eu.org gr.it gr.jp grainger grajewo.pl gran.no grandrapids.museum grane.no granvin.no graphics...

github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
github.com/hashicorp/logutils v1.0.0/go.mod h1:QIAnNjmIWmVIIkWDTG1z5v++HQmx9WQRO+LraFDTW64=
github.com/hashicorp/mdns v1.0.0/go.mod h1:tL+uN++7HEJ6SQLQ2/p+z2pH24WQKWjBPkE0mNTz8vQ=
github.com/hashicorp/memberlist v0.1.3/go.mod h1:ajVTdAv/9Im8oMAAj5G31PhhMCZJV2pPBoIllUwCN7I=
github.com/hashicorp/serf v0.8.2/go.mod h1:6hOLApaqBFA1NXqRQAsxw9QxuDEvNxSQRwA/JwenrHc=