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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 map(self, f, preservesPartitioning=False):
 """ Return a new RDD by applying a function to each element of this RDD. [('a', 1), ('b', 1), ('c', 1)] """

        def func(_, iterator):
            return map(fail_on_stopiteration(f), iterator)
        return self.mapPartitionsWithIndex(func, preservesPartitioning)