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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 foreach(self, f):
 """ Applies a function to all elements of this RDD. """

        f = fail_on_stopiteration(f)

        def processPartition(iterator):
            for x in iterator:
                f(x)
            return iter([])
        self.mapPartitions(processPartition).count()