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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 _infodict(cls, name):
 """load the info dictionary for the given name"""

        info = cls._dataset_info.get(name, None)
        if info is None:
            raise ValueError('No such dataset {0} exists, '
                             'use list_datasets() to get a list '
                             'of available datasets.'.format(name))
        return info