Python类inheriten

2024-03-29 08:13:26 发布

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Possible Duplicate:
subclass __init__ overrides superclass’s

class A():
    z = 'z it is'
    def __init__(self):
        self.a = 'a it is'

class B(A):
    def __init__(self):
        self.b = 'b it is'

b = B()
print b.z # z it is 
print b.a # AttributeError: B instance has no attribute 'a'

b是从A类继承的B类的实例。这不意味着我可以访问父类的属性吗?你知道吗


Tags: instanceselfinitisdefitclassattributeerror