Quick and simpe way to get a regulate your chromecast audio over the menu tray

chromecast volume menu tray

import rumps # rumps==0.2.1a0 
import pychromecast # PyChromecast==2.3.0 

chromecast = None

def get_chromecast(device_name):
    chromecasts = pychromecast.get_chromecasts()

    for chromecast in chromecasts:
        if chromecast.device.friendly_name == device_name:
            return chromecast

    raise Exception("could not find chromecast")


def change_volume(sender):
    volume = sender.value
    chromecast.set_volume(volume)


if __name__ == "__main__":
    chromecast = get_chromecast("Living Room speaker")

    app = rumps.App("Chromecast Volume", title=chromecast.device.friendly_name)
    app.menu = [
        rumps.SliderMenuItem("Volume", 0, 0, 1, callback=change_volume),
    ]
app.run()