1 class CounterList(list):
2 def __init__(self, *args):
3 super(CounterList, self).__init__(*args)
4 self.counter = 0
5
6 def __getitem__(self, index):
7 self.counter += 1
8 return super(CounterList, self).__getitem__(index)
9
10
11 cl = CounterList(range(10))
12 print(cl)
13 cl.reverse()
14 print(cl)
15 del(cl[3:6])
16 print(cl)
17 print(cl.counter)
18 cl[4] + cl[2]
19 print(cl.counter)
输出：
>>>
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
[9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
[9, 8, 7, 3, 2, 1, 0]
0
2
posted on 2013-05-21 22:14
unixfy 阅读(141)
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