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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 next_interval(self, interval):
 """ Given a value of an interval, this function returns the next interval value """

        index = np.where(self.intervals == interval)
        if index[0][0] + 1 < len(self.intervals):
            return self.intervals[index[0][0] + 1]
        else:
            raise IndexError("Ran out of intervals!")