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Python单例，以2为例_Python_Singleton - Fatal编程技术网
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  • Python单例，以2为例

Python单例，以2为例

python

Python单例，以2为例,python,singleton,Python,Singleton,请先阅读以下内容： 结果: Singleton.__new__ called with class <class '__main__.Cache'> Singleton.__new__ creating instance of class <class '__main__.Cache'> Cache.__init__ called with size 0 Singleton.__new__ called with class <class '__main__.Cac

请先阅读以下内容：

结果:

Singleton.__new__ called with class <class '__main__.Cache'>
Singleton.__new__ creating instance of class <class '__main__.Cache'>
Cache.__init__ called with size 0
Singleton.__new__ called with class <class '__main__.Cache'>
Singleton.__new__ called with class <class '__main__.Cache'>
Singleton.__new__ called with class <class '__main__.Cache'>
Singleton.__new__ called with class <class '__main__.Cache'>

Singleton.\uuuuu new\uuuuuu用类调用
Singleton.\uuuu新建\uuuu创建类的实例
缓存.\uuuu init\uuuuuu被调用，大小为0
Singleton.\uuuuu new\uuuuuuuu与类一起调用
Singleton.\uuuuu new\uuuuuuuu与类一起调用
Singleton.\uuuuu new\uuuuuuuu与类一起调用
Singleton.\uuuuu new\uuuuuuuu与类一起调用
它现在似乎可以工作了，但问题是在Singleton中显式调用inhering classinit是否是pythonic的？有没有可能出问题的smth？

不起作用。实际上，您从未从
\uuuu new\uuuu
返回任何内容，因此它将返回默认值
None
<代码>cls.\u实例设置正确，但调用
缓存时无法获得
cls.\u实例
这是针对个人的：

Singleton.__new__ called with class <class '__main__.Cache'>
Singleton.__new__ creating instance of class <class '__main__.Cache'>
Cache.__init__ called with size 0
Singleton.__new__ called with class <class '__main__.Cache'>
Singleton.__new__ called with class <class '__main__.Cache'>
Singleton.__new__ called with class <class '__main__.Cache'>
Singleton.__new__ called with class <class '__main__.Cache'>