#NEWLINE# @ classmethod #NEWLINE# def open( cls , pkg_file = None ) : #NEWLINE# #INDENT# '\n        Return |Package| instance loaded with contents of .pptx package at\n        *pkg_file*, or the default presentation package if *pkg_file* is\n        missing or |None|.\n        ' #NEWLINE# if ( pkg_file is None ) : #NEWLINE# #INDENT# pkg_file = pkg_file . _default_pptx_path #NEWLINE# #UNINDENT# return super ( Package , cls ) . open ( pkg_file )