#NEWLINE# def __init__( self , question , docs , tags = None ) : #NEWLINE# #INDENT# super ( POSTagExtractor , self ) . __init__ ( question , self ) #NEWLINE# if ( not tags ) : #NEWLINE# #INDENT# raise InvalidExtractorError ( 'No tag provided for POSTagExtractor' ) #NEWLINE# #UNINDENT# self . tags = tags