# 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('/')

cluster for this to work. If you'd rather use `emptyDir`, disable PersistentVolumeClai by: ```bash helm install --set persistence.enabled=false minio/minio ``` > *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."* Existing PersistentVolumeClai ---------- If a Persistent Volume Claim already exists, specify it during installation....

cluster for this to work. If you'd rather use `emptyDir`, disable PersistentVolumeClai by: ```bash helm install --set persistence.enabled=false minio/minio ``` > *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."* Existing PersistentVolumeClai ---------- If a Persistent Volume Claim already exists, specify it during installation....

cluster for this to work. If you'd rather use `emptyDir`, disable PersistentVolumeClai by: ```bash helm install --set persistence.enabled=false minio/minio ``` > *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."* Existing PersistentVolumeClai ---------- If a Persistent Volume Claim already exists, specify it during installation....

cluster for this to work. If you'd rather use `emptyDir`, disable PersistentVolumeClai by: ```bash helm install --set persistence.enabled=false minio/minio ``` > *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."* ### Existing PersistentVolumeClai If a Persistent Volume Claim already exists, specify it during installation. 1....

cluster for this to work. If you'd rather use `emptyDir`, disable PersistentVolumeClai by: ```bash helm install --set persistence.enabled=false minio/minio ``` > *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."* Existing PersistentVolumeClai ---------- If a Persistent Volume Claim already exists, specify it during installation....

cluster for this to work. If you'd rather use `emptyDir`, disable PersistentVolumeClai by: ```bash helm install --set persistence.enabled=false minio/minio ``` > *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."* Existing PersistentVolumeClai ---------- If a Persistent Volume Claim already exists, specify it during installation....

cluster for this to work. If you'd rather use `emptyDir`, disable PersistentVolumeClai by: ```bash helm install --set persistence.enabled=false minio/minio ``` > *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."* Existing PersistentVolumeClai ---------- If a Persistent Volume Claim already exists, specify it during installation....

cluster for this to work. If you'd rather use `emptyDir`, disable PersistentVolumeClai by: ```bash helm install --set persistence.enabled=false minio/minio ``` > *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."* Existing PersistentVolumeClai ---------- If a Persistent Volume Claim already exists, specify it during installation....

cluster for this to work. If you'd rather use `emptyDir`, disable PersistentVolumeClai by: ```bash helm install --set persistence.enabled=false minio/minio ``` > *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."* Existing PersistentVolumeClai ---------- If a Persistent Volume Claim already exists, specify it during installation....