amixer unable to find simple control 'master' 0 about douban.fm HOT 8 CLOSED

    def get_volume(self):
        if self.platform == 'Linux':
            volume = subprocess.check_output('amixer get Master | grep Mono: | cut -d " " -f 6', shell=True)
            return volume[1:-3]
        elif self.platform == 'Darwin':
            return subprocess.check_output('osascript -e "output volume of (get volume settings)"', shell=True)
        else:
            return

    # 调整音量大小
    def change_volume(self, increment):
        if increment == 1:
            volume = int(self.volume) + 5
        else:
            volume = int(self.volume) - 5
        if self.platform == 'Linux':
            subprocess.Popen('amixer set Master ' + str(volume) + '% >/dev/null 2>&1', shell=True)
        elif self.platform == 'Darwin':
            subprocess.Popen('osascript -e "set volume output volume ' + str(volume) + '"', shell=True)
        else:
            pass