from enum import Enum

class YesNoEnum(str, Enum):
    YES = "yes"
    NO = "no"

class OnOffEnum(str, Enum):
    ON = "on"
    OFF = "off"

class UnitEnum(str, Enum):
    KiB = "KiB"
    MiB = "MiB"
    GiB = "GiB"
    TiB = "TiB"