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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 missing_labels(self):
 """ A 1D `~numpy.ndarray` of the sorted non-zero labels that are missing in the consecutive sequence from zero to the maximum label number. """


        return np.array(sorted(set(range(0, self.max_label + 1)).
                               difference(np.insert(self.labels, 0, 0))))