零基础入门学习Python 作者：小甲鱼 让编程改变世界 Change the world by program 一些相关的BIF issubclass(class, classinfo) 一些相关的BIF isinstance(object, classinfo) 一些相关的BIF hasattr(object, name) getattr(object, name, default) setattr(object, name, value) delattr(object, name) 一些相关的BIF property(fget=None, fset=None, fdel=None, doc=None)