用字符串的思路来完成

def is_palindrome(n):

    def reverseStr(name):
        order = []
        for s in name:
            order.append(s)
        order.reverse()
        return ''.join(order)

    return str(n) == reverseStr(str(n))

output = filter(is_palindrome, range(1, 1000))
print(list(output))