Handle zip py3

                     for deg in range(1, self.max_deg+1)]

    # Generate dicts

    deg_adj_dict = dict(zip(self.deg_adj_lists_placeholders, deg_adj_lists))

    deg_adj_dict = dict(list(zip(self.deg_adj_lists_placeholders, deg_adj_lists)))

    atoms_dict = {self.atom_features_placeholder : atoms,

                  self.deg_slice_placeholder : batch.deg_slice,

                  self.membership_placeholder : batch.membership}