* Zelfs dependencies kunnen dependencies hebben, waardoor een hiërarchie of **“graph” van dependencies** ontstaat.
* Allemaal **automatisch afgehandeld** door het framework.
* Alle dependencies kunnen data nodig hebben van request, de vereiste **padoperaties veranderen** en automatische documentatie verstrekken.
* **Automatische validatie** zelfs voor *padoperatie* parameters gedefinieerd in dependencies.

Het wordt al geïnstalleerd met **FastAPI**.

```Python hl_lines="1  4"
{!> ../../docs_src/python_types/tutorial013.py!}
```

////

Python zelf doet niets met deze `Annotated` en voor editors en andere hulpmiddelen is het type nog steeds een `str`.

Zie de sectie <a href="https://fastapi.tiangolo.com/benchmarks/" class="internal-link" target="_blank">Benchmarks</a> om hier meer over te lezen.

## Afhankelijkheden

      xdsPushes:
        self.query(
          '{{type}}',
          sum(irate('pilot_xds_pushes'), by=['type'])
        ),

      xdsErrors: [
        self.query(
          'Rejected Config ({{type}})',
          sum('pilot_total_xds_rejects', by=['type'])
        ),
        self.query(
          'Internal Errors',
          'pilot_total_xds_internal_errors'
        ),
        self.query(

class Depends:
    def __init__(
        self, dependency: Optional[Callable[..., Any]] = None, *, use_cache: bool = True
    ):
        self.dependency = dependency
        self.use_cache = use_cache

    def __repr__(self) -> str:
        attr = getattr(self.dependency, "__name__", type(self.dependency).__name__)
        cache = "" if self.use_cache else ", use_cache=False"
        return f"{self.__class__.__name__}({attr}{cache})"

                """
            ),
        ] = True,
    ):
        self.model = HTTPBaseModel(scheme="basic", description=description)
        self.scheme_name = scheme_name or self.__class__.__name__
        self.realm = realm
        self.auto_error = auto_error

    async def __call__(  # type: ignore
        self, request: Request
    ) -> Optional[HTTPBasicCredentials]:

                auth.
                """
            ),
        ] = None,
    ):
        self.grant_type = grant_type
        self.username = username
        self.password = password
        self.scopes = scope.split()
        self.client_id = client_id
        self.client_secret = client_secret


class OAuth2PasswordRequestFormStrict(OAuth2PasswordRequestForm):
    """

  protected B usingGenerator(G subjectGenerator) {
    this.subjectGenerator = subjectGenerator;
    return self();
  }

  public G getSubjectGenerator() {
    return subjectGenerator;
  }

  @CanIgnoreReturnValue
  public B withSetUp(Runnable setUp) {
    this.setUp = setUp;
    return self();
  }

  public Runnable getSetUp() {
    return setUp;
  }

  @CanIgnoreReturnValue

pkg debug/elf, const DF_1_NODIRECT DynFlag1 #56887
pkg debug/elf, const DF_1_NODUMP = 4096 #56887
pkg debug/elf, const DF_1_NODUMP DynFlag1 #56887
pkg debug/elf, const DF_1_NOHDR = 1048576 #56887
pkg debug/elf, const DF_1_NOHDR DynFlag1 #56887
pkg debug/elf, const DF_1_NOKSYMS = 524288 #56887
pkg debug/elf, const DF_1_NOKSYMS DynFlag1 #56887
pkg debug/elf, const DF_1_NOOPEN = 64 #56887

        @property
        def alias(self) -> str:
            a = self.field_info.alias
            return a if a is not None else self.name

        @property
        def required(self) -> bool:
            return self.field_info.is_required()

        @property
        def default(self) -> Any:
            return self.get_default()

        @property
        def type_(self) -> Any: