```Python
q: str
```

à la place de :

```Python
q: Union[str, None] = None
```

Mais maintenant, on déclare `q` avec `Query`, comme ceci :

```Python
q: Union[str, None] = Query(default=None, min_length=3)
```

```JSON
{"item_id":3}
```

/// check

Notice that the value your function received (and returned) is `3`, as a Python `int`, not a string `"3"`.

So, with that type declaration, **FastAPI** gives you automatic request <abbr title="converting the string that comes from an HTTP request into Python data">"parsing"</abbr>.

///

## Data validation { #data-validation }

author_link: https://coffeebytes.dev/en/authors/eduardo-zepeda/ link: https://coffeebytes.dev/es/python-fastapi-el-mejor-framework-de-python/ title: 'Tutorial de FastAPI, ¿el mejor framework de Python?' Podcasts: English: - author: Real Python author_link: https://realpython.com/ link: https://realpython.com/podcasts/rpp/72/ title: Starting With FastAPI and Examining Python's Import System - Episode 72 - author: Python Bytes FM author_link: https://pythonbytes.fm/ link: https://www.pythonpodcast.com/fasta...

## `python-jose` installieren.

Wir müssen <abbr title="JOSE: JavaScript Object Signing and Encryption">`python-jose`</abbr> installieren, um die JWT-Tokens in Python zu generieren und zu verifizieren:

<div class="termy">

```console
$ pip install "python-jose[cryptography]"

---> 100%
```

</div>

import jakarta.servlet.ServletContext;

/**
 * Job for executing Python scripts within the Fess search engine environment.
 * This job extends ExecJob to provide Python-specific functionality for running
 * Python scripts with proper environment setup and argument passing.
 *
 * <p>Python scripts are executed in the WEB-INF/env/python/resources directory

Bu işlemi standart modern Python tipleriyle yapıyoruz.

Yeni bir sözdizimi yapısını, bir kütüphane özel metod veya sınıfları öğrenmeye gerek yoktur.

Hepsi sadece **Python** standartlarına dayalıdır.

Örnek olarak, `int` tanımlamak için:

```Python
item_id: int
```

ya da daha kompleks herhangi bir python modelini tanımlayabiliriz, örneğin `Item` modeli için:

```Python

# 📨 📁

👆 💪 🔬 📁 📂 👩‍💻 ⚙️ `File`.

/// info

📨 📂 📁, 🥇 ❎ <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

🤶 Ⓜ. `pip install python-multipart`.

👉 ↩️ 📂 📁 📨 "📨 💽".

///

## 🗄 `File`

🗄 `File` &amp; `UploadFile` ⚪️➡️ `fastapi`:

{* ../../docs_src/request_files/tutorial001.py hl[1] *}

## 🔬 `File` 🔢

```

/// check | Verifique



///

	Observe que o valor recebido pela função (e também retornado por ela) é `3`, como um Python `int`, não como uma string `"3"`.

	Então, com essa declaração de tipo, o **FastAPI** dá pra você um <abbr title="convertendo a string que veio do request HTTP em um dado Python">"parsing"</abbr> automático no request .

## Validação de dados

Y envían un request con un nombre de usuario `johndoe` y una contraseña `love123`.

Entonces el código de Python en tu aplicación equivaldría a algo como:

```Python
if "johndoe" == "stanleyjobson" and "love123" == "swordfish":
    ...
```

Und sie senden eine Anfrage mit dem Benutzernamen `johndoe` und dem Passwort `love123`.

Dann würde der Python-Code in Ihrer Anwendung etwa so aussehen:

```Python
if "johndoe" == "stanleyjobson" and "love123" == "swordfish":
    ...
```