non_zeros = filter (not . WLPA.equal_wrt_graph weighted_example WLPA.Zero . WLPA.convertTerm) twos
non_zeros = filter (not . WLPA.equal_wrt_graph weighted_example WLPA.Zero . WLPA.convertTerm) twos
non_zeros = filter (not . WLPA.equal_wrt_graph weighted_example WLPA.Zero . WLPA.convertTerm) twos