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#2
davidlv4192013-10-06 12:44
回复 楼主 zjkedy
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程序代码：class A():
def __init__(self):
pass
def __del__(self):
pass
val={'1':'3'}
class B(A):
def __init__(self):
pass
def __del__(self):
pass
def set_val(self):
for _key, value in self.val.items():
self.val['1'] = '4'
b = B()
a = A()
print "A---",a.val
print "B---",b.val
b.set_val()
print "A---",a.val
print "B---",b.val
结果：def __init__(self):
pass
def __del__(self):
pass
val={'1':'3'}
class B(A):
def __init__(self):
pass
def __del__(self):
pass
def set_val(self):
for _key, value in self.val.items():
self.val['1'] = '4'
b = B()
a = A()
print "A---",a.val
print "B---",b.val
b.set_val()
print "A---",a.val
print "B---",b.val
A---｛‘1’：‘3’｝
B---｛‘1’：‘3’｝
A---｛‘1’：‘4’｝
B---｛‘1’：‘4’｝
为什么子类进行的字典操作，会影响基类？
