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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 run_mapper(self, stdin=sys.stdin, stdout=sys.stdout):
 """ Run the mapper on the hadoop node. """

        self.init_hadoop()
        self.init_mapper()
        outputs = self._map_input((line[:-1] for line in stdin))
        if self.reducer == NotImplemented:
            self.writer(outputs, stdout)
        else:
            self.internal_writer(outputs, stdout)