擅长:python、mysql、java
<p>备选答案:</p>
<pre><code>@property
def NotImplementedField(self):
raise NotImplementedError
class a(object):
x = NotImplementedField
class b(a):
# x = 5
pass
b().x
a().x
</code></pre>
<p>这与Evan类似,但简洁且便宜——您只会得到一个NotImplementedField实例。</p>