How to use Phonon::VolumeSlider in PyQt

In PyQt there's a widget called Phonon::VolumeSlider. I would like to know how I can take value from it if a user slides it. I know for push buttons you would type:

  self."""nameofbutton""".clicked.connect(self."""nameofbutton"""_clicked)

in the object class definition. But since you can't click an audio slider and my example says CLICKED.connect, I can't do that. Please tell me how I can make a line like this for my class. Thanks.