Undefined,
)

_Unset: Any = Undefined


class ParamTypes(Enum):
    query = "query"
    header = "header"
    path = "path"
    cookie = "cookie"


class Param(FieldInfo):  # type: ignore[misc]
    in_: ParamTypes

    def __init__(
        self,
        default: Any = Undefined,
        *,
        default_factory: Union[Callable[[], Any], None] = _Unset,
        annotation: Optional[Any] = None,

class Example(TypedDict, total=False):
    summary: Optional[str]
    description: Optional[str]
    value: Optional[Any]
    externalValue: Optional[AnyUrl]

    __pydantic_config__ = {"extra": "allow"}  # type: ignore[misc]


class ParameterInType(Enum):
    query = "query"
    header = "header"
    path = "path"
    cookie = "cookie"


class Encoding(BaseModelWithConfig):
    contentType: Optional[str] = None

* 🐛 Fix edge case with repeated aliases names not shown in OpenAPI. PR [#2351](https://github.com/tiangolo/fastapi/pull/2351) by [@klaa97](https://github.com/klaa97).
* 📝 Add misc dependency installs to tutorial docs. PR [#2126](https://github.com/tiangolo/fastapi/pull/2126) by [@TeoZosa](https://github.com/TeoZosa).

### Docs