python 静态成员变量
python 也可以定义静态成员变量，就是类的变量。注意python的静态成员变量只能通过 类.变量名 的形式获取
废话不多了，看代码吧
1 class A:
2 a1 = 0
3 def __init__(self, a2):
4 self.a2 = a2
5
6 def setData(self, a3):
7 self.a3 = a3
8
9 def show(self):
10 print 'A1:%s,a1:%s,a2:%s,a3:%s' %(A.a1, self.a1, self.a2, self.a3)
11
12 if __name__ == '__main__':
13 obj1 = A(1)
14 obj2 = A(2)
15 obj3 = A(3)
16
17 obj1.setData(1)
18 obj2.setData(2)
19 obj3.setData(3)
20
21 obj1.a1 = 1
22 obj2.a1 = 2
23 obj3.a1 = 3
24
25 A.a1 = 1
26 A.a2 = 2
27 A.a3 = 3
28 obj1.show()
29 obj2.show()
30 obj3.show()
31 print 'A1:%s,A2:%s,A3:%s' %(A.a1, A.a2, A.a3)
输出结果：
A1:1,a1:1,a2:1,a3:1
A1:1,a1:2,a2:2,a3:2
A1:1,a1:3,a2:3,a3:3
A1:1,A2:2,A3:3
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