Return given associations in a dict, id2gos

def _get_id2gos(self, associations, **kws):
        """Return given associations in a dict, id2gos"""
        options = AnnoOptions(self.evobj, **kws)
        # Default reduction is to remove. For all options, see goatools/anno/opts.py:
        #   * Evidence_Code == ND -> No biological data No biological Data available
        #   * Qualifiers contain NOT
        assc = self.reduce_annotations(associations, options)
        return self._get_dbid2goids(assc) if options.b_geneid2gos else self._get_goid2dbids(assc)