#NEWLINE# @ tornado . gen . coroutine #NEWLINE# def perform( self , ctx , propname , gentext ) : #NEWLINE# #INDENT# seed = self . computeseed ( ctx , propname ) #NEWLINE# if ( ( ( seed % 65535 ) / 65535.0 ) < self . chance ) : #NEWLINE# #INDENT# ( yield gentext . perform ( ctx , propname , self . node ) )