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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 set_interval(self, start, end, value, compact=False):
 """Set the value for the time series on an interval. If compact is True, only set the value if it's different from what it would be anyway. """

        # for each interval to render
        for i, (s, e, v) in enumerate(self.iterperiods(start, end)):
            # look at all intervals included in the current interval
            # (always at least 1)
            if i == 0:
                # if the first, set initial value to new value of range
                self.set(s, value, compact)
            else:
                # otherwise, remove intermediate key
                del self[s]

        # finish by setting the end of the interval to the previous value
        self.set(end, v, compact)