Assign new attrs to this object.

        Returns a new object equivalent to self.attrs.update(*args, **kwargs).

        Parameters
        ----------
        args : positional arguments passed into ``attrs.update``.
        kwargs : keyword arguments passed into ``attrs.update``.

        Returns
        -------
        assigned : same type as caller
            A new object with the new attrs in addition to the existing data.

        See also
        --------
        Dataset.assign

def assign_attrs(self, *args, **kwargs):
        """Assign new attrs to this object.

        Returns a new object equivalent to self.attrs.update(*args, **kwargs).

        Parameters
        ----------
        args : positional arguments passed into ``attrs.update``.
        kwargs : keyword arguments passed into ``attrs.update``.

        Returns
        -------
        assigned : same type as caller
            A new object with the new attrs in addition to the existing data.

        See also
        --------
        Dataset.assign
        """
        out = self.copy(deep=False)
        out.attrs.update(*args, **kwargs)
        return out