def volume_up(hass, entity_id=None):
    data = {ATTR_ENTITY_ID: entity_id} if entity_id else {}
    hass.services.call(DOMAIN, SERVICE_VOLUME_UP, data)
Returns a string representing the :class:`BaseAnalogSignal`.
dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/components/media_player/__init__.py/volume_up--crossover with--dataset/ETHPy150Open NeuralEnsemble/python-neo/neo/core/analogsignal.py/BaseAnalogSignal.__repr__