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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 abort(cls, mapreduce_id, **kwargs):
 """Causes a job to abort. Args: mapreduce_id: The job to abort. Not verified as a valid job. """

    cls(key_name="%s:%s" % (mapreduce_id, cls._KEY_NAME),
        command=cls.ABORT).put(**kwargs)