def export_library_to_xml(modulestore, contentstore, library_key, root_dir, library_dir):
 LibraryExportManager(modulestore, contentstore, library_key, root_dir, library_dir).export()

def export_library_to_xml ( modulestore , contentstore , library_key , root_dir , library_dir ) : LibraryExportManager ( modulestore , contentstore , library_key , root_dir , library_dir ) . export ( )
thin wrapper for the library export manager .