"Intended Audience :: Developers",
    "License :: OSI Approved :: MIT License",
    "Programming Language :: Python :: 3 :: Only",
    "Programming Language :: Python :: 3.8",
    "Programming Language :: Python :: 3.9",
    "Programming Language :: Python :: 3.10",
    "Programming Language :: Python :: 3.11",
    "Programming Language :: Python :: 3.12",
    "Topic :: Internet :: WWW/HTTP :: HTTP Servers",

### ✍ `FastAPI` 📱

```Python hl_lines="46"
{!../../../docs_src/nosql_databases/tutorial001.py!}
```

### ✍ *➡ 🛠️ 🔢*

👆 📟 🤙 🗄 &amp; 👥 🚫 ⚙️ <a href="https://docs.couchbase.com/python-sdk/2.5/async-programming.html#asyncio-python-3-5" class="external-link" target="_blank">🥼 🐍 <code>await</code> 🐕‍🦺</a>, 👥 🔜 📣 👆 🔢 ⏮️ 😐 `def` ↩️ `async def`.

One particular advantage that is not necessarily obvious is that you can **generate clients** (sometimes called <abbr title="Software Development Kits">**SDKs**</abbr> ) for your API, for many different **programming languages**.

## OpenAPI Client Generators

There are many tools to generate clients from **OpenAPI**.

A common tool is <a href="https://openapi-generator.tech/" class="external-link" target="_blank">OpenAPI Generator</a>.

{!../../../docs_src/nosql_databases/tutorial001.py!}
```

### Create the *path operation function*

As our code is calling Couchbase and we are not using the <a href="https://docs.couchbase.com/python-sdk/2.5/async-programming.html#asyncio-python-3-5" class="external-link" target="_blank">experimental Python <code>await</code> support</a>, we should declare our function with normal `def` instead of `async def`.

It is designed to be very simple to use, and to make it very easy for any developer to integrate other components with **FastAPI**.

## What is "Dependency Injection"

**"Dependency Injection"** means, in programming, that there is a way for your code (in this case, your *path operation functions*) to declare things that it requires to work and use: "dependencies".

Ama yine de, FastAPI, Requests'ten oldukça ilham aldı.

**Requests**, <abbr title="API (Application Programming Interface): Uygulama Programlama Arayüzü">API'lar</abbr> ile bir istemci olarak *etkileşime geçmeyi* sağlayan bir kütüphaneyken **FastAPI** bir sunucu olarak <abbr title="API (Application Programming Interface): Uygulama Programlama Arayüzü">API'lar</abbr> oluşturmaya yarar.

```Python hl_lines="46"
{!../../../docs_src/nosql_databases/tutorial001.py!}
```

### *path operation関数*の作成

私たちのコードはCouchbaseを呼び出しており、<a href="https://docs.couchbase.com/python-sdk/2.5/async-programming.html#asyncio-python-3-5" class="external-link" target="_blank">実験的なPython <code>await</code></a>を使用していないので、私たちは`async def`ではなく通常の`def`で関数を宣言する必要があります。

That's why it makes a lot of sense to use asynchronous ⏸🔀⏯ code for web APIs.

This kind of asynchronicity is what made NodeJS popular (even though NodeJS is not parallel) and that's the strength of Go as a programming language.

And that's the same level of performance you get with **FastAPI**.