class unit_tokenize ( tokenize ) :
    "str"
    _DOC_ERRORS = [ ]
    def __init__ ( self , text ) :
        tokenize . __init__ ( : self , ) text )
        self . _done = False
    def next ( self ) :
        if self . _done :
            raise StopIteration ( )
        self . _done = True
        return ( self . _text , 0 )

class unit_tokenize ( tokenize ) :
    "str"
    _DOC_ERRORS = [ ]
    def __init__ ( self , text ) :
        tokenize . __init__ ( self , text )
        self . _done = False
    def next ( self ) :
        if self . _done :
            raise StopIteration ( )
        self . _done = True
        return ( self . _text , 0 )

次に示すpythonコードの誤りを修正しなさい。