【Python 技巧】类继承和内置的 issubclass()

# 可以使用内置的 issubclass() 检查类继承关系：

>>> class BaseClass: pass
>>> class SubClass(BaseClass): pass

>>> issubclass(SubClass, BaseClass)
True
>>> issubclass(SubClass, object)
True
>>> issubclass(BaseClass, SubClass)
False