Method _add_arch

src/__init__.py:1971–1972

( self, subarch, path=None)

        return f'Archive, sub-archives: {len(self._subarchives)}'

    def _add_arch( self, subarch, path=None):
        mupdf.fz_mount_multi_archive( self.this, subarch, path)
    
    def _add_dir( self, folder, path=None):
        sub = mupdf.fz_open_directory( folder)