标签：assign bsp init space 查找 ssi python 类 就会 特性
实例的属性存储在实例的__dict__中,类属性和方法存储在类的__dict__中.查找属性时,先检查特性,然后实例的__dict__,然后类的__dict__,然后基类.都不存在就会抛出异常.
print ‘***************************************************‘
class AA:
count = 0
def __init__(self):
pass
def AddCount(self):
print ‘id -> self.__class__.count self.count‘
print id(self.__class__.count)
print id(self.count)
print self.count
self.__class__.count = self.__class__.count + 1
print ‘----------id after class assign--------‘
print ‘id -> self.__class__.count self.count‘
print id(self.__class__.count)
print id(self.count)
print self.count
self.count = self.count + 1
print ‘----------id after instance assign--------‘
print id(self.count)
if __name__ == "__main__":
print id(AA.count)
a = AA()
a.AddCount()
print a.count
print ‘***************************************************‘
b = AA()
b.AddCount()
print b.count
***************************************************
8207488
id -> self.__class__.count self.count
8207488
8207488
0
----------id after class assign--------
id -> self.__class__.count self.count
8207464
8207464
1
----------id after instance assign--------
8207440
2
***************************************************
id -> self.__class__.count self.count
8207464
8207464
1
----------id after class assign--------
id -> self.__class__.count self.count
8207440
8207440
2
----------id after instance assign--------
8207416
3
python 类变量和实例变量
标签：assign bsp init space 查找 ssi python 类 就会 特性
原文地址：http://www.cnblogs.com/abelian/p/6142224.html
