擅长:python、mysql、java
<p>因为这不是单身汉。单身汉必须是单身,你的对象不是单身。在</p>
<pre><code>>>> class preSingleton(object):
... def __call__(self):
... return self
...
>>> singleton = preSingleton()
>>> singleton2 = preSingleton()
>>> singleton
<__main__.preSingleton object at 0x00C6D410>
>>> singleton2
<__main__.preSingleton object at 0x00C6D290>
</code></pre>