Assert that at least one file in npz zipfile ends with .npy

    def sniff(self, filename: str) -> bool:

        try:

            npz = np.load(filename)

            if isinstance(npz, np.lib.npyio.NpzFile):

            with np.load(filename) as npz:

                if isinstance(npz, np.lib.npyio.NpzFile) and any(f.filename.endswith(".npy") for f in npz.zip.filelist):

                    return True

        except Exception:

            return False