def resolve_dataset(self,dataset_name):
        """
        Looks up a dataset name and return its location,
        or None if it's unknown.

        :param dataset_name: a canonical dataset name, 'mnist' for e.g.
        :returns: A path, if dataset is found, or None otherwise.
        """
        if dataset_name in self.installed_packages_list:
            return os.path.join( self.installed_packages_list[dataset_name].where,
                                 self.installed_packages_list[dataset_name].name )
        else:
            return None
dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/dataset_get/dataset_resolver.py/dataset_resolver.resolve_dataset/original