## Использование `StaticFiles`

* Импортируйте `StaticFiles`.
* "Примонтируйте" экземпляр `StaticFiles()` с указанием определенной директории.

```Python hl_lines="2  6"
{!../../../docs_src/static_files/tutorial001.py!}
```

!!! note "Технические детали"
    Вы также можете использовать `from starlette.staticfiles import StaticFiles`.

from dirty_equals import IsDict
from fastapi.testclient import TestClient

from docs_src.request_files.tutorial001_an import app

client = TestClient(app)


def test_post_form_no_body():
    response = client.post("/files/")
    assert response.status_code == 422, response.text
    assert response.json() == IsDict(
        {
            "detail": [
                {
                    "type": "missing",

@pytest.fixture(name="app")
def get_app():
    from docs_src.request_forms_and_files.tutorial001_an_py39 import app

    return app


@pytest.fixture(name="client")
def get_client(app: FastAPI):
    client = TestClient(app)
    return client


@needs_py39
def test_post_form_no_body(client: TestClient):
    response = client.post("/files/")
    assert response.status_code == 422, response.text

Hello Wade Wilson from Python
```

</div>

As environment variables can be set outside of the code, but can be read by the code, and don't have to be stored (committed to `git`) with the rest of the files, it's common to use them for configurations or settings.

You can also create an environment variable only for a specific program invocation, that is only available to that program, and only for its duration.

## Review all the files

 Remember you should have a directory named `my_super_project` that contains a sub-directory called `sql_app`.

`sql_app` should have the following files:

* `sql_app/__init__.py`: is an empty file.

* `sql_app/database.py`:

```Python

    * JSON.
    * Path parameters.
    * Query parameters.
    * Cookies.
    * Headers.
    * Forms.
    * Files.
* <abbr title="also known as: serialization, parsing, marshalling">Conversion</abbr> of output data: converting from Python data and types to network data (as JSON):

    * <abbr title="Query parameters">پارامترهای پرسمان</abbr>.
    * <abbr title="Cookies">کوکی‌ها</abbr>.
    * <abbr title="Headers">سرآیند‌ها (هدرها)</abbr>.
    * <abbr title="Forms">فرم‌ها</abbr>.
    * <abbr title="Files">فایل‌ها</abbr>.
* <abbr title="serialization, parsing, marshalling">تبدیل</abbr> داده خروجی: تبدیل از انواع و داده‌ پایتون به داده شبکه  (مانند JSON):
    * تبدیل انواع داده پایتونی (`str`, `int`, `float`, `bool`, `list` و غیره).

from fastapi.testclient import TestClient

from docs_src.request_files.tutorial001 import app

client = TestClient(app)


file_required = {
    "detail": [
        {
            "loc": ["body", "file"],
            "msg": "field required",
            "type": "value_error.missing",
        }
    ]
}


def test_post_form_no_body():
    response = client.post("/files/")
    assert response.status_code == 422, response.text

<a href="https://github.com/scalar/scalar/?utm_source=fastapi&utm_medium=website&utm_campaign=main-badge" target="_blank" title="Scalar: Beautiful Open-Source API References from Swagger/OpenAPI files"><img src="https://fastapi.tiangolo.com/img/sponsors/scalar.svg"></a>

**Spoiler alert**: туторіал - посібник користувача містить:

* Оголошення **параметрів** з інших місць як: **headers**, **cookies**, **form fields** та **files**.
* Як встановити **перевірку обмежень** як `maximum_length` або `regex`.