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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _format_volume_string(self, volume_string):
 """ format vlc's volume """

        self.actual_volume = int(volume_string.split(self.volume_string)[1].split(',')[0].split()[0])
        return '[Vol: {}%] '.format(int(100 * self.actual_volume / self.max_volume))