def init_structure(self, total_num_bonds, total_num_atoms,<EOL>total_num_groups, total_num_chains, total_num_models,<EOL>structure_id):
self.mmtf_version = constants.MMTF_VERSION<EOL>self.mmtf_producer = constants.PRODUCER<EOL>self.num_atoms = total_num_atoms<EOL>self.num_bonds = total_num_bonds<EOL>self.num_groups = total_num_groups<EOL>self.num_chains = total_num_chains<EOL>self.num_models = total_num_models<EOL>self.structure_id = structure_id<EOL>self.x_coord_list = []<EOL>self.y_coord_list = []<EOL>self.z_coord_list = []<EOL>self.group_type_list = []<EOL>self.entity_list = []<EOL>self.b_factor_list = []<EOL>self.occupancy_list = []<EOL>self.atom_id_list = []<EOL>self.alt_loc_list = []<EOL>self.ins_code_list = []<EOL>self.group_id_list = []<EOL>self.sequence_index_list = []<EOL>self.group_list = []<EOL>self.chain_name_list = []<EOL>self.chain_id_list = []<EOL>self.bond_atom_list = []<EOL>self.bond_order_list = []<EOL>self.sec_struct_list = []<EOL>self.chains_per_model = []<EOL>self.groups_per_chain = []<EOL>self.current_group = None<EOL>self.bio_assembly = []<EOL>
Initialise the structure object.
        :param total_num_bonds: the number of bonds in the structure
        :param total_num_atoms: the number of atoms in the structure
        :param total_num_groups: the number of groups in the structure
        :param total_num_chains: the number of chains in the structure
        :param total_num_models: the number of models in the structure
        :param structure_id the: id of the structure (e.g. PDB id)