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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 rename_compute(self, old_compute, new_compute):
 """ Change the label of a compute attached to the Bundle :parameter str old_compute: the current name of the compute options (must exist) :parameter str new_compute: the desired new name of the compute options (must not exist) :return: None :raises ValueError: if the new_compute is forbidden """

        # TODO: raise error if old_compute not found?

        self._check_label(new_compute)
        self._rename_label('compute', old_compute, new_compute)