"$ref": "#/components/schemas/Body_login_login_post"
                                }
                            }
                        },
                        "required": True,
                    },
                }
            },
            "/users/me": {
                "get": {
                    "responses": {
                        "200": {

                                }
                            }
                        },
                        "required": True,
                    },
                }
            },
            "/users/me/": {
                "get": {
                    "responses": {
                        "200": {

### Erforderlich mit Ellipse (`...`)

Es gibt eine Alternative, die explizit deklariert, dass ein Wert erforderlich ist. Sie können als Default das <abbr title='Zeichenfolge, die einen Wert direkt darstellt, etwa 1, "hallowelt", True, None'>Literal</abbr> `...` setzen:

=== "Python 3.9+"

    ```Python hl_lines="9"
    {!> ../../../docs_src/query_params_str_validations/tutorial006b_an_py39.py!}
    ```

=== "Python 3.8+"

* and in there, find the module `dependencies` (the file at `app/dependencies.py`)...
* and from it, import the function `get_token_header`.

That works correctly! 🎉

---

The same way, if we had used three dots `...`, like in:

```Python
from ...dependencies import get_token_header
```

that would mean:

Тогда для `Query` укажите параметр `deprecated=True`:

=== "Python 3.10+"

    ```Python hl_lines="19"
    {!> ../../../docs_src/query_params_str_validations/tutorial010_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="19"

You can find an example of Alembic in a FastAPI project in the templates from [Project Generation - Template](../project-generation.md){.internal-link target=_blank}. Specifically in <a href="https://github.com/tiangolo/full-stack-fastapi-postgresql/tree/master/src/backend/app/alembic" class="external-link" target="_blank">the `alembic` directory in the source code</a>.

### Create a dependency

                    "summary": "Read Item",
                    "operationId": "read_item_items__item_id__get",
                    "parameters": [
                        {
                            "required": True,
                            "schema": {"title": "Item Id", "type": "string"},
                            "name": "item_id",
                            "in": "path",
                        }
                    ],

                    "summary": "Read Item",
                    "operationId": "read_item_items__item_id__get",
                    "parameters": [
                        {
                            "required": True,
                            "schema": {"title": "Item Id", "type": "string"},
                            "name": "item_id",
                            "in": "path",
                        }
                    ],

                                    "$ref": "#/components/schemas/Body_create_file_files__post"
                                }
                            }
                        },
                        "required": True,
                    },
                }
            }
        },
        "components": {
            "schemas": {
                "Body_create_file_files__post": {

                                    "$ref": "#/components/schemas/Body_login_login_post"
                                }
                            }
                        },
                        "required": True,
                    },
                }
            },
            "/users/me": {
                "get": {
                    "responses": {
                        "200": {