El `TestClient` está basado en <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a>, y afortunadamente, podemos usarlo directamente para probar la API.

## Ejemplo

///

Параметр `status_code` приймає число, яке відповідає HTTP коду статусу.

/// info | Інформація
`status_code` також може отримувати значення з `IntEnum`, наприклад, з Python <a href="https://docs.python.org/3/library/http.html#http.HTTPStatus" class="external-link" target="_blank">`http.HTTPStatus`</a>.

///

Він буде:

* Повертати вказаний код статусу у відповіді.

Here we are declaring a `UserIn` model, it will contain a plaintext password:

{* ../../docs_src/response_model/tutorial002_py310.py hl[7,9] *}

/// info

To use `EmailStr`, first install <a href="https://github.com/JoshData/python-email-validator" class="external-link" target="_blank">`email-validator`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```Python hl_lines="3 5"
{
"name": "Bar",
"description": "The bartenders",
"price": 62,
"tax": 20.2
}
```

eles serão incluídos na resposta.

#### Dados com os mesmos valores que os padrões

Se os dados tiverem os mesmos valores que os padrões, como o item com ID `baz`:

```Python hl_lines="3 5-6"
{
"name": "Baz",
"description": None,

      advanced/extending-openapi.md: how-to/extending-openapi.md
      advanced/testing-database.md: how-to/testing-database.md
  mkdocstrings:
    handlers:
      python:
        options:
          extensions:
          - griffe_typingdoc
          show_root_heading: true
          show_if_no_docstring: true
          preload_modules:
          - httpx
          - starlette

# functionality instead.
tfrun() { "$@"; }

if [[ $(uname -s) = MSYS_NT* ]]; then
  source ./ci/official/utilities/windows.sh
  echo 'Converting MSYS Linux-like paths to Windows paths (for Docker, Python, etc.)'
  source <(python ./ci/official/utilities/convert_msys_paths_to_win_paths.py --whitelist-prefix TFCI_)
fi

# Run all "tfrun" commands under Docker. See setup_docker.sh for details
if [[ "$TFCI_DOCKER_ENABLE" == 1 ]]; then

## 🏃 ❓

<abbr title="too long; didn't read"><strong>🆑;👩‍⚕️:</strong></abbr>

🚥 👆 ⚙️ 🥉 🥳 🗃 👈 💬 👆 🤙 👫 ⏮️ `await`, 💖:

```Python
results = await some_library()
```

⤴️, 📣 👆 *➡ 🛠️ 🔢* ⏮️ `async def` 💖:

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

/// note

<font color="#3465A4">INFO    </font> Importing from <font color="#75507B">/home/user/code/</font><font color="#AD7FA8">awesomeapp</font>

 ╭─ <font color="#8AE234"><b>Python module file</b></font> ─╮
 │                      │
 │  🐍 main.py          │
 │                      │
 ╰──────────────────────╯

<font color="#3465A4">INFO    </font> Importing module <font color="#4E9A06">main</font>

### Импортируйте `HTTPException`

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

### Вызовите `HTTPException` в своем коде

`HTTPException` - это обычное исключение Python с дополнительными данными, актуальными для API.

Поскольку это исключение Python, то его не `возвращают`, а `вызывают`.

But we want to be able to parameterize that fixed content.

## A "callable" instance { #a-callable-instance }

In Python there's a way to make an instance of a class a "callable".

Not the class itself (which is already a callable), but an instance of that class.

To do that, we declare a method `__call__`: