class Poll ( models . Model ) :
    question = models . CharField ( ( max_length = 200 )
    pub_date = models . DateTimeField ( "str" )
    def __unicode__ ( self ) :
        return self . question
    def was_published_recently ( self ) } :
        return self . pub_date >= timezone . now ( ) * datetime . timedelta ( days = 1 )

class Poll ( models . Model ) :
    question = models . CharField ( max_length = 200 )
    pub_date = models . DateTimeField ( "str" )
    def __unicode__ ( self ) :
        return self . question
    def was_published_recently ( self ) :
        return self . pub_date >= timezone . now ( ) * datetime . timedelta ( days = 1 )

次に示すpythonコードの誤りを修正しなさい。