#NEWLINE# def clear_value( self , ctx ) : #NEWLINE# #INDENT# '\n        clears any currently set value for this node\n        ' #NEWLINE# node_state = self . _get_state ( ctx ) #NEWLINE# node_state . has_value = False #NEWLINE# node_state . value = None #NEWLINE# node_state . generator = None #NEWLINE# self . _set_dirty ( node_state , DIRTY_FLAGS_ALL , 0 )