How to use the goprocam.constants.Camera.Interface function in goprocam

size_bytes = value*ammnt
            size_name = ("B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB")
            i = int(math.floor(math.log(size_bytes, 1024)))
            p = math.pow(1024, i)
            size = round(size_bytes/p, 2)
            storage = "" + str(size) + str(size_name[i])
            return str(storage)
        if param == "media_size":
            size_bytes = value
            size_name = ("B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB")
            i = int(math.floor(math.log(size_bytes, 1024)))
            p = math.pow(1024, i)
            size = round(size_bytes/p, 2)
            storage = "" + str(size) + str(size_name[i])
            return str(storage)
        if self.whichCam() == constants.Camera.Interface.GPControl:
            if param == "mode":
                if value == 0:
                    return "Video"
                if value == 1:
                    return "Photo"
                if value == 2:
                    return "Multi-Shot"
            if param == "sub_mode":
                if self.getStatus(constants.Status.Status, constants.Status.STATUS.Mode) == 0:
                    if value == 0:
                        return "Video"
                    if value == 1:
                        return "TimeLapse Video"
                    if value == 2:
                        return "Video+Photo"
                    if value == 3: