删除索引项周围的括号

Question

我使用的是python33，windows10和命令行。我想摆脱出现在＆＃39; 7x3＆＃39;周围的括号。等等。另外，有更简单的方法吗？我在while语句和if else语句下放置try和except语句时遇到了麻烦。此外，我希望有一种方法可以将doMath（）调用用作bigMath（）的参数。有没有办法结束shell中的无限循环而不关闭它？是否有人可以使用lambda函数关键字演示此程序？欢迎提出所有建议。

def doMath(Multiplication):
        b = [21, 32, 36, 42, 45, 48, 49, 54, 56, 63 ]
        n = [  '7 x 3' , ' 8 x 4 ', ' 9 x 4 ',' 7 x 6 ', ' 5 x 9 ',' 8 x 6 ' ,' 7 x 7 ', ' 9 x 6 ',' 7 x 8 ', ' 7 x 9 '  ]
        x = 0
        if Multiplication == b[x]:

            print('correct')


        else: 
            while Multiplication != b[x]:
                        print('Sorry that is an incorrect answer.')
                        try:
                                Multiplication=int(input ('Whats The Answer to (%s)? : ' % (n[x])))
                        except ValueError:
                                print('Numbers usally have no letters or special characters')
        while x <9:
                try:
                        Multiplication=int(input ('Whats The Answer to (%s)? : ' % (n[x+1])))   
                except ValueError:
                        print('Numbers usally have no letters or special characters')
                if Multiplication == b[x+1]:

                        print('correct')
                        x =  x+1

                elif x == 10:
                        break

                else: 

                        print('Sorry that is an incorrect answer.')

def bigMath():
        Multip = 'Pure Imagination'
        while Multip != 21:
                try:
                        Multip = int(input ('Whats The Answer to 7 x 3? '))
                        if Multip != 21:
                                print('Sorry that is an incorrect answer.')
                except ValueError:
                        print('Numbers usally have no letters or special characters')
        doMath(Multip)

bigMath()