Оскільки шлях кожної *операції шляху* має починатися з `/`, як у:

```Python hl_lines="1"
@router.get("/{item_id}")
async def read_item(item_id: str):
    ...
```

...префікс не має містити кінцевий `/`.

Отже, у цьому випадку префікс - це `/items`.

```py
#!/usr/bin/env python3
from __future__ import print_function
import paho.mqtt.client as mqtt

# This is the Subscriber

def on_connect(client, userdata, flags, rc):
  print("Connected with result code "+str(rc))
  # qos level is set to 1
  client.subscribe("minio", 1)

def on_message(client, userdata, msg):
    print(msg.payload)

		4: {bucketName: bucket, inputData: []byte(""), expectedError: ObjectNameInvalid{Bucket: bucket, Object: ""}},

		// Valid object and bucket names but non-existent bucket.
		5: {bucketName: "abc", objName: "def", inputData: []byte(""), expectedError: BucketNotFound{Bucket: "abc"}},

		// Input to replicate Md5 mismatch.
		6: {
			bucketName: bucket, objName: object, inputData: []byte(""),

demo.jelastic.com
democracia.bo
democrat
demon.nl
deno-staging.dev
deno.dev
dental
dentist
dep.no
deporte.bo
des.br
desa.id
desi
design
design.aero
det.br
deta.app
deta.dev
dev
dev-myqnapcloud.com
dev.br
development.run
devices.resinstaging.io
df.gov.br
df.leg.br
dfirma.pl
dgca.aero
dh.bytemark.co.uk
dhl
diadem.cloud

```Python
response = requests.get("http://example.com/some/url")
```

Die entsprechende *Pfadoperation* der FastAPI-API könnte wie folgt aussehen:

```Python hl_lines="1"
@app.get("/some/url")
def read_url():
    return {"message": "Hello World"}
```

Sehen Sie sich die Ähnlichkeiten in `requests.get(...)` und `@app.get(...)` an.

/// check | Inspirierte **FastAPI**

WÇ‚Bõ#“v„ ¡—¾ ) ´Ö ÷W9 ¾G 2ÊÐæ‡ FÐ]ÚâÂÉV€^éYK/ÑzŸ°Ù™+æÏ— C‘nÈ%¼ ÂØM’òÈýUã¦ó4Íó7 ­Â óÍ»us5e¦ ¢ó ­²ªiz¨ïÅ¿9V )‚óÏÜzó éÝAù{V¾·¨SúwM¹e®lî‹j¼-M– ²Ç¾pß¼M ƒ14 ’p0 )×£ Ù ÆÍù- ÀÆd‰ ^ š½0® îÊr ­f¬ \à¾×ég—! sÑ'ˆ3wi øÈ ëƒ:×ÖÛW,jŒ…,c'œ‰iä Ÿ %…2͚Ƨ» 1ì-Îe XϤ­âù ×Àw \ƃá (ELð15ûüètvë½ç;Ê’×ëŠ0Ñëºh "R ç(j?xÚ´ÄSvM¢ oÓj®:ëtÆé´D±¡±y ?=bœ³~5ï0ËDeí:ˆŠ÷'ºv?dÚ•ÊY>¼³Ÿ÷…^] &_Êï Î u²À 0Ÿ Ÿ‡qXF½Î%‹ %Ë multisitea/data/disterasure/xl3/.minio.sys/pool.bin/xl.meta XL2 Æ w Ä$•Ä Ó ÉŸþ¥¹ °Ä ºHØH Å Kƒ¤Type ¥V2ObjÞ ¢IDÄ ¤DDirÄ 5 A·DoCÁ§slÂ0RÿŦEcAlgo...

* 空のファイル `__init__.py` を作成します。
* 次の内容で `main.py` ファイルを作成します：

```Python
from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: str | None = None):
    return {"item_id": item_id, "q": q}
```

### Dockerfile { #dockerfile }

{* ../../docs_src/bigger_applications/app_an_py310/routers/items.py hl[5:10,16,21] title["app/routers/items.py"] *}

由于每个*路径操作*的路径都必须以 `/` 开头，例如：

```Python hl_lines="1"
@router.get("/{item_id}")
async def read_item(item_id: str):
    ...
```

...前缀不能以 `/` 作为结尾。

因此，本例中的前缀为 `/items`。

我们还可以添加一个 `tags` 列表和额外的 `responses` 列表，这些参数将应用于此路由器中包含的所有*路径操作*。

    assertFailsWith<IOException> {
      sink2.writeUtf8("abc")
      sink2.flush()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("stream was reset: REFUSED_STREAM")
    }
    sink1.writeUtf8("def")
    sink1.close()
    assertFailsWith<ConnectionShutdownException> {
      connection.newStream(headerEntries("c", "cola"), true)
    }
    assertThat(stream1.isOpen).isTrue()

```Python
response = requests.get("http://example.com/some/url")
```

이에 대응하는 FastAPI의 API *경로 처리*는 다음과 같이 보일 수 있습니다:

```Python hl_lines="1"
@app.get("/some/url")
def read_url():
    return {"message": "Hello World"}
```

`requests.get(...)`와 `@app.get(...)`의 유사성을 확인해 보세요.

/// check | **FastAPI**에 영감을 준 것

* 단순하고 직관적인 API를 갖기.