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如何判断类是类

妙音 posted @ 2018年6月29日 07:29 in python , 995 阅读

在写动态加载时,通常需要过滤出需要的类。如何从模块中过滤出其中的类呢?

  • 判断a是类A的实例
isinstance(a, A)
  • 判断B类是A的子类
issubclass(B, A)
  • 判断A是一个类
isinstance(A, type) 
  • 判断B是类并且是A的子类
isinstance(B, type) and issubclass(B, A)
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