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        ret = name[0].upper()
        for i in name[1:]:
            ret = ret + i.lower() #字符拼接
        return ret


		def prod(L):
            def Mul(x, y):
                return x*y
        return reduce(Mul, L)

        #练习3的难点在小数点处理,看了大家的思路:一刀切两半分别处理,然后再拼接成小数

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