Bao gồm các thư viện bên ngoài cũng dựa trên Pydantic, như <abbr title="Object-Relational Mapper">ORM</abbr>s, <abbr title="Object-Document Mapper">ODM</abbr>s cho cơ sở dữ liệu.

Nó cũng có nghĩa là trong nhiều trường hợp, bạn có thể truyền cùng object bạn có từ một request **trực tiếp cho cơ sở dữ liệu**, vì mọi thứ được validate tự động.

def dependency_list() -> List[str]:
    return []


DepList = Annotated[List[str], Depends(dependency_list)]


def create_dependency(name: str):
    def fun(deps: DepList):
        deps.append(name)

    return Depends(fun)


router = APIRouter(dependencies=[create_dependency("router")])
prefix_router = APIRouter(dependencies=[create_dependency("prefix_router")])

class ConnectionManager:
    def __init__(self):
        self.active_connections: List[WebSocket] = []

    async def connect(self, websocket: WebSocket):
        await websocket.accept()
        self.active_connections.append(websocket)

    def disconnect(self, websocket: WebSocket):
        self.active_connections.remove(websocket)

    async def send_personal_message(self, message: str, websocket: WebSocket):

    @app.post("/login")
    def login(form_data: Annotated[OAuth2PasswordRequestForm, Depends()]):
        data = {}
        data["scopes"] = []
        for scope in form_data.scopes:
            data["scopes"].append(scope)
        if form_data.client_id:
            data["client_id"] = form_data.client_id
        if form_data.client_secret:
            data["client_secret"] = form_data.client_secret
        return data
    ```

    This only happens when you install using this included `requirements.txt` instead of running `pip install fastapi` directly.

    That is because inside the `requirements.txt` file, the local version of FastAPI is marked to be installed in "editable" mode, with the `-e` option.

### Format the code

There is a script that you can run that will format and clean all your code:

<div class="termy">

```console

The same would happen if you had something like a <abbr title='A union between multiple types means "any of these types".'>union</abbr> between different types where one or more of them are not valid Pydantic types, for example this would fail 💥:

    sponsors = []
    for key in keys:
        sponsor_group = []
        for login, sponsor in tiers[key].items():
            sponsor_group.append(
                {"login": login, "avatarUrl": sponsor.avatarUrl, "url": sponsor.url}
            )
        sponsors.append(sponsor_group)

    people = {
        "maintainers": maintainers,
        "experts": experts,
        "last_month_experts": last_month_experts,

Inklusive externer Bibliotheken, die auf Pydantic basieren, wie <abbr title="Object-Relational Mapper (Abbildung von Objekten auf relationale Strukturen)">ORM</abbr>s, <abbr title="Object-Document Mapper (Abbildung von Objekten auf nicht-relationale Strukturen)">ODM</abbr>s für Datenbanken.

    * PR [#291](https://github.com/tiangolo/fastapi/pull/291).

## 0.27.2

* Fix path and query parameters receiving `dict` as a valid type. It should be mapped to a body payload. PR [#287](https://github.com/tiangolo/fastapi/pull/287). Updated docs at: [Query parameter list / multiple values with defaults: Using `list`](https://fastapi.tiangolo.com/tutorial/query-params-str-validations/#using-list).

        settings=settings, discussion_number=discussion_number
    )

    while discussion_edges:
        for discussion_edge in discussion_edges:
            comment_nodes.append(discussion_edge.node)
        last_edge = discussion_edges[-1]
        discussion_edges = get_graphql_translation_discussion_comments_edges(
            settings=settings,
            discussion_number=discussion_number,