parmed.Structure# add(to_item, item[, atom_indices, ...]) append_structures(item[, structure_id, ...]) copy(item[, skip_digestion]) extract(item[, atom_indices, ...]) has_attribute(molecular_system, attribute[, ...]) is_form(item) StructuresIterator(molecular_system[, ...]) TopologyIterator(molecular_system) merge(items[, atom_indices, skip_digestion]) set to_file_cif to_file_mol2 to_file_pdb to_file_psf to_mdtraj_Topology to_mdtraj_Trajectory to_molsysmt_MolSys to_molsysmt_Structures to_molsysmt_Topology to_nglview_NGLWidget to_openmm_Modeller to_openmm_Topology to_parmed_GromacsTopologyFile