De plus, la meilleure approche était d'utiliser des normes déjà existantes.

Ainsi, avant même de commencer à coder **FastAPI**, j'ai passé plusieurs mois à étudier les spécifications d'OpenAPI, JSON Schema, OAuth2, etc. Comprendre leurs relations, leurs similarités et leurs différences.

## Conception

Ensuite, j'ai passé du temps à concevoir l'"API" de développeur que je voulais avoir en tant qu'utilisateur (en tant que développeur utilisant FastAPI).

        self.call = call
        self.use_cache = use_cache
        # Store the path to be able to re-generate a dependable from it in overrides
        self.path = path
        # Save the cache key at creation to optimize performance

## FastAPI features

**FastAPI** gives you the following:

### Based on open standards

* <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank"><strong>OpenAPI</strong></a> for API creation, including declarations of <abbr title="also known as: endpoints, routes">path</abbr> <abbr title="also known as HTTP methods, as POST, GET, PUT, DELETE">operations</abbr>, parameters, body requests, security, etc.

<blockquote markdown="1">

**FastAPI** wouldn't exist if not for the previous work of others.

There have been many tools created before that have helped inspire its creation.

I have been avoiding the creation of a new framework for several years. First I tried to solve all the features covered by **FastAPI** using many different frameworks, plug-ins, and tools.

    font-family: 'Roboto Mono', 'Fira Mono', Consolas, Menlo, Monaco, 'Courier New', Courier, monospace;
    border-radius: 4px;
    padding: 75px 45px 35px;
    position: relative;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    line-height: 1.2;
}

[data-termynal]:before {
    content: '';
    position: absolute;
    top: 15px;
    left: 15px;

``` hl_lines="5"
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

Da sich diese Datei im selben Package befindet, können Sie relative Importe verwenden, um das Objekt `app` aus dem `main`-Modul (`main.py`) zu importieren:

```Python hl_lines="3"
{!../../../docs_src/app_testing/test_main.py!}
```

... und haben den Code für die Tests wie zuvor.

**FastAPI** 🍕 🔗 ⏮️ (&amp; ⚓️ 🔛) <a href="https://docs.pydantic.dev/" class="external-link" target="_blank"><strong>Pydantic</strong></a>. , 🙆 🌖 Pydantic 📟 👆 ✔️, 🔜 👷.

✅ 🔢 🗃 ⚓️ 🔛 Pydantic, <abbr title="Object-Relational Mapper">🐜</abbr>Ⓜ, <abbr title="Object-Document Mapper">🏭</abbr>Ⓜ 💽.

👉 ⛓ 👈 📚 💼 👆 💪 🚶‍♀️ 🎏 🎚 👆 🤚 ⚪️➡️ 📨 **🔗 💽**, 🌐 ✔ 🔁.

🎏 ✔ 🎏 🌌 🤭, 📚 💼 👆 💪 🚶‍♀️ 🎚 👆 🤚 ⚪️➡️ 💽 **🔗 👩‍💻**.

## The normal process

The normal (default) process, is as follows.

A `FastAPI` application (instance) has an `.openapi()` method that is expected to return the OpenAPI schema.

As part of the application object creation, a *path operation* for `/openapi.json` (or for whatever you set your `openapi_url`) is registered.

It just returns a JSON response with the result of the application's `.openapi()` method.

                    <mxGeometry relative="1" as="geometry">
                        <Array as="points">
                            <mxPoint x="800" y="521"/>
                            <mxPoint x="800" y="560"/>
                        </Array>

from dirty_equals import IsOneOf
from fastapi import FastAPI
from fastapi.testclient import TestClient

app = FastAPI(
    servers=[
        {"url": "/", "description": "Default, relative server"},
        {
            "url": "http://staging.localhost.tiangolo.com:8000",
            "description": "Staging but actually localhost still",
        },
        {"url": "https://prod.example.com"},
    ]
)


@app.get("/foo")
def foo():