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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 push(self, metric_name=None, metric_value=None, volume=None):
 """ Ship that shit off to graphite broski """


        graphite_path = self.path_prefix
        graphite_path += '.' + self.device + '.' + 'volume'
        graphite_path += '.' + volume + '.' + metric_name

        metric = Metric(graphite_path, metric_value, precision=4,
                        host=self.device)

        self.publish_metric(metric)