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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 set_mapper_index(self, index, mapper):
 """Set the mapper to the given index :param index: the index to set :type index: QtCore.QModelIndex :param mapper: the mapper to set :type mapper: QtGui.QDataWidgetMapper :returns: None :rtype: None :raises: None """

        parent = index.parent()
        mapper.setRootIndex(parent)
        mapper.setCurrentModelIndex(index)