def postprocess(
        self, value: str | int | float | list[str | int | float] | None
    ) -> str | int | float | list[str | int | float] | None:
        """
        Parameters:
            value: Expects a `str | int | float` corresponding to the value of the dropdown entry to be selected. Or, if `multiselect` is True, expects a `list` of values corresponding to the selected dropdown entries.
        Returns:
            Returns the values of the selected dropdown entry or entries.
        """
        if value is None:
            return None
        if self.multiselect:
            if not isinstance(value, list):
                value = [value]
            [self._warn_if_invalid_choice(_y) for _y in value]
        else:
            self._warn_if_invalid_choice(value)
        return value

        Parameters:
            value: Expects a `str | int | float` corresponding to the value of the dropdown entry to be selected. Or, if `multiselect` is True, expects a `list` of values corresponding to the selected dropdown entries.
        Returns:
            Returns the values of the selected dropdown entry or entries.
        
gradio/components/dropdown.py