molsysmt.form.molsysmt_MolSys.append_structures# molsysmt.form.molsysmt_MolSys.append_structures(to_item, item=None, structure_id=None, time=None, coordinates=None, velocities=None, box=None, temperature=None, potential_energy=None, kinetic_energy=None, atom_indices='all', structure_indices='all', skip_digestion=False)[source]#