This subpackage is used for reading and writing an AtomArray or AtomArrayStack using the internal NPZ file format. This binary format is used to store NumPy arrays. Since atom arrays and stacks are completely built on NumPy arrays, this format is preferable for Biotite internal usage due to fast I/O operations and preservation of all atom annotation arrays.



This class represents a NPZ file, the preferable format for Biotite internal structure storage.