* Erstellen Sie eine `main.py`-Datei mit:

```Python
from typing import Union

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: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

### Dockerfile

```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(""),

        .Builder()
        .body("ABC")
        .clearHeaders()
        .addHeader("Content-Length: 4")
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .body("DEF")
        .build(),
    )
    val urlConnection = server.url("/").toUrl().openConnection()
    urlConnection!!.readTimeout = 1000
    val inputStream = urlConnection.getInputStream()

{!../../docs_src/bigger_applications/app/routers/items.py!}
```

Como el path de cada *path operation* tiene que empezar con `/`, como en:

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

...el prefijo no debe incluir un `/` final.

Así que, el prefijo en este caso es `/items`.

{!../../docs_src/bigger_applications/app/routers/items.py!}
```

Como o caminho de cada *operação de rota* deve começar com `/`, como em:

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

...o prefixo não deve incluir um `/` final.

Então, o prefixo neste caso é `/items`.

{!../../docs_src/bigger_applications/app/routers/items.py!}
```

Da der Pfad jeder *Pfadoperation* mit `/` beginnen muss, wie in:

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

... darf das Präfix kein abschließendes `/` enthalten.

Das Präfix lautet in diesem Fall also `/items`.

{!../../docs_src/bigger_applications/app/routers/items.py!}
```

Так как каждый *эндпоинт* начинается с символа `/`:

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

...то префикс не должен заканчиваться символом `/`.

В нашем случае префиксом является `/items`.

🌌 👆 ⚙️ ⚫️ 📶 🙅. 🖼, `GET` 📨, 👆 🔜 ✍:

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

FastAPI 😑 🛠️ *➡ 🛠️* 💪 👀 💖:

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

👀 🔀 `requests.get(...)` & `@app.get(...)`.

/// check | 😮 **FastAPI**

* ✔️ 🙅 & 🏋️ 🛠️.
* ⚙️ 🇺🇸🔍 👩‍🔬 📛 (🛠️) 🔗, 🎯 & 🏋️ 🌌.

型を使用した標準的なPythonを記述します:

```Python
from datetime import date

from pydantic import BaseModel

# Declare a variable as a str
# and get editor support inside the function
def main(user_id: str):
    return user_id


# A Pydantic model
class User(BaseModel):
    id: int
    name: str
    joined: date
```

これは以下のように用いられます:

```Python