Method update

starlette/datastructures.py:367–375

(
        self,
        *args: MultiDict | Mapping[Any, Any] | list[tuple[Any, Any]],
        **kwargs: Any,
    )

        self._dict[key] = value

    def update(
        self,
        *args: MultiDict | Mapping[Any, Any] | list[tuple[Any, Any]],
        **kwargs: Any,
    ) -> None:
        value = MultiDict(*args, **kwargs)
        existing_items = [(k, v) for (k, v) in self._list if k not in value.keys()]
        self._list = existing_items + value.multi_items()
        self._dict.update(value)


class QueryParams(ImmutableMultiDict[str, str]):