<blockquote>
<p><strong>Possible Duplicate:</strong><br/>
<a href="https://stackoverflow.com/questions/13545985/subclass-init-overrides-superclasss">subclass __init__ overrides superclass’s</a> </p>
</blockquote>
<pre><code>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'
</code></pre>
<p><code>b</code>是从<code>A</code>类继承的<code>B</code>类的实例。这不意味着我可以访问父类的属性吗?你知道吗</p>