[已解决]关于列表推导式的问题

chinajz

1. x  = [[],[],[],[],[]]
   
2. y= [x[i].append(i) for i in range(5)]
   
3. print(x,":",y)
   
4. x  = [[],[],[],[],[]]
   
5. for i in range(5):
   
6.      y[i] = x[i].append(i)
   
7. print(x,":",y)

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运行结果两者一样：

1. [[0], [1], [2], [3], [4]] : [None, None, None, None, None]
   
2. [[0], [1], [2], [3], [4]] : [None, None, None, None, None]

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