您正在將字符串傳遞給bin()函數：>>> bin('10')Traceback (most recent call last):  File "<stdin>", line 1, in <module>TypeError: 'str' object cannot be interpreted as an index給它一個整數來代替：>>> bin(10)'0b1010'通過將raw_input()結果轉換為int()：n = int(raw_input())提示：您可以通過給負片跨度輕松地反轉字符串：>>> 'forward'[::-1]'drawrof'因此您可以將功能簡化為：def reversebinary():    n = int(raw_input())    bin_n = bin(n)[2:]    revbin = bin_n[::-1]    return int(revbin, 2)甚至：def reversebinary():    n = int(raw_input())    return int(bin(n)[:1:-1], 2)