#NEWLINE# def push( self , attrs = None ) : #NEWLINE# #INDENT# 'Push attribute values in `attrs` onto the stack\n        ' #NEWLINE# if ( attrs is None ) : #NEWLINE# #INDENT# attrs = self . push_attrs #NEWLINE# #UNINDENT# values = [ getattr ( self , x ) for x in attrs ] #NEWLINE# self . push_attrs_stack . append ( ( attrs , attrs ) )