def is_palindrome(n): y = str(n) L = len(y) for i in range(L): y1 = int(y[-(1 + i)]) y2 = int(y[i]) if y1 == y2: return n else: return None# 测试:output =list(filter(is_palindrome, range(1, 200))) print('1~200:', output) if output == [1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191]: print('测试成功!') else: print('测试失败!')
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