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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 pprint_label(self):
        "The pretty-printed label string for the Dimension"
        unit = ('' if self.unit is None
                else type(self.unit)(self.unit_format).format(unit=self.unit))
        return bytes_to_unicode(self.label) + bytes_to_unicode(unit)