Align get_labeled_entries and get_unlabeled_entries

[J535D165]

get_labeled_entries and get_unlabeled_entries are confusing to me. The latter one returns the entry index while get_labeled_entries doesn't. I would be great if get_labeled_entries had the option to return the index.

It's about this piece of code:

    def get_labeled_entries(self):
        """
        Returns list of labeled feature and their label
        Returns
        -------
        labeled_entries : list of (feature, label) tuple
            Labeled entries
        """
        return list(filter(lambda entry: entry[1] is not None, self.data))

    def get_unlabeled_entries(self):
        """
        Returns list of unlabeled features, along with their entry_ids
        Returns
        -------
        unlabeled_entries : list of (entry_id, feature) tuple
            Labeled entries
        """
        return [
            (idx, entry[0]) for idx, entry in enumerate(self.data)
            if entry[1] is None
        ]

Thanks a lot for this lib. It's very useful.