def go_back(self, n=1):
        """Move `n` questions back in the questionnaire by removing the last `n`
        answers.
        """
        if not self.can_go_back:
            return
        N = max(len(self.answers)-abs(n), 0)
        self.answers = OrderedDict(islice(self.answers.items(), N))
def go_back(self, n=1):
        """Move `n` questions back in the questionnaire by removing the last `n`
        answers.
        """
        if not self.can_go_back:
            return
        N = max(len(self.answers)-abs(n), 0)
        self.answers = OrderedDict(islice(self.answers.items(), N))
def go_back ( self , n = 1 ) : if not self . can_go_back : return N = max ( len ( self . answers ) - abs ( n ) , 0 ) self . answers = OrderedDict ( islice ( self . answers . items ( ) , N ) )
Move `n` questions back in the questionnaire by removing the last `n`
        answers.
Move n questions back in the questionnaire by removing the last n answers .