74022a39782d4251d30b9942b566fb0eca8d67c1,homeassistant/components/sensor/rfxtrx.py,,,#,20

Before Change

DEVICE_SCHEMA = vol.Schema({
    vol.Optional(ATTR_NAME, default=None): cv.string,
    vol.Required(ATTR_PACKETID): rfxtrx.validate_packetid,
    vol.Optional(ATTR_DATA_TYPE, default=None):
        vol.In(list(DATA_TYPES.keys())),
})

After Change

DEVICE_SCHEMA = vol.Schema({
    vol.Optional(ATTR_NAME, default=None): cv.string,
    vol.Optional(ATTR_DATA_TYPE, default=[]):
        vol.All(cv.ensure_list, [vol.In(DATA_TYPES.keys())]),
})

Instances