代码是： def hui(a): if str(a)==str(a)[::-1]: return a n=input('n=',) s=[] for b in range(n): s.append(hui(b)) print (s) 结果是： n=34 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, None, 11, None, None, None, None, None, None, None, None, None, None, 22, None, None, None, None, None, None, None, None, None, None, 33] 不return这none呢？ 百思不得解
怎么才能不return这些none？
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星星的天空
代码是： def hui(a): if str(a)==str(a)[::-1]: return a n=input('n=',) s=[] for b in range(n): s.append(hui(b)) print (s) 结果是： n=34 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, None, 11, None, None, None, None, None, None, None, None, None, None, 22, None, None, None, None, None, None, None, None, None, None, 33] 不return这none呢？ 百思不得解