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Python 装饰器详解
当写 Python 程序时,经常会遇到一种场景:一个函数本身的逻辑很简单,但在它执行前后,需要附加一些额外的功能。比如打印日志、计算耗时、做权限校验、添加缓存。如果没有装饰器,往往只能在函数里手动加上这些重复的代码,不仅冗余,而且破坏了函数 ...
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