`FastAPI` is a Python class that provides all the functionality for your API.

!!! note "Technical Details"
    `FastAPI` is a class that inherits directly from `Starlette`.

    You can use all the <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> functionality with `FastAPI` too.

### Step 2: create a `FastAPI` "instance"

```Python hl_lines="3"
{!../../../docs_src/first_steps/tutorial001.py!}

## Gereksinimler

FastAPI iki devin omuzları üstünde duruyor:

* Web tarafı için <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a>.
* Data tarafı için <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a>.

## Kurulum

<div class="termy">

```console

```Python hl_lines="1"
{!../../../docs_src/first_steps/tutorial001.py!}
```

`FastAPI`は、APIのすべての機能を提供するPythonクラスです。

!!! note "技術詳細"
    `FastAPI`は`Starlette`を直接継承するクラスです。

    `FastAPI`でも<a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a>のすべての機能を利用可能です。

### Step 2: `FastAPI`の「インスタンス」を生成

```Python hl_lines="3"
{!../../../docs_src/first_steps/tutorial001.py!}
```

## Prérequis

FastAPI repose sur les épaules de géants :

* <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> pour les parties web.
* <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> pour les parties données.

## Installation

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

**Typer** is FastAPI's little sibling. And it's intended to be the **FastAPI of CLIs**. ⌨️ 🚀

## Requirements

FastAPI stands on the shoulders of giants:

* <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> for the web parts.
* <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> for the data parts.

## Installation

<div class="termy">

```console

message StatefulSetOrdinals {
  // start is the number representing the first replica's index. It may be used
  // to number replicas from an alternate index (eg: 1-indexed) over the default
  // 0-indexed names, or to orchestrate progressive movement of replicas from
  // one StatefulSet to another.
  // If set, replica indices will be in the range:
  //   [.spec.ordinals.start, .spec.ordinals.start + .spec.replicas).

    final WeakReference<ServiceManagerState> state;

    ServiceListener(Service service, WeakReference<ServiceManagerState> state) {
      this.service = service;
      this.state = state;
    }

    @Override
    public void starting() {
      ServiceManagerState state = this.state.get();
      if (state != null) {
        state.transitionService(service, NEW, STARTING);

		// successfully exited, we NEVER want to identify this pod as broken.
		// If the pod is going to fail, the failure state will show up in
		// LastTerminationState eventually.
		if state := container.State.Terminated; state != nil {
			if state.Reason == "Completed" || state.ExitCode == 0 {
				continue
			}
		}

		// Check the LastTerminationState struct for information about why the container

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```