获取对象信息 type isinstance getattr setattr hasattr(2)

>>> hasattr(obj, 'power')
True
>>> getattr(obj, 'power')
<bound method MyObject.power of <__main__.MyObject object at 0x1014be400>>
>>> fn = getattr(obj, 'power')
>>> fn
<bound method MyObject.power of <__main__.MyObject object at 0x1014be400>>
>>> fn()
81