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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 setMaxDaysBack(self, maxDaysBack):
 """ what is the maximum allowed age of the results? """

        assert isinstance(maxDaysBack, int), "maxDaysBack value has to be a positive integer"
        assert maxDaysBack >= 1
        self.topicPage["maxDaysBack"] = maxDaysBack