Python: 练习 获取类中的自定义属性和方法

import inspect


class A(object):
    a = 10

    @classmethod
    def get_attribute(cls):
        print('1', vars(cls))
        print('2', dir(cls))
        print('3', cls.__dir__(cls))
        print('4', cls.__dict__)
        print('5', locals())
        print('6', globals())
        print('*' * 20)

        attr_ = inspect.getmembers(cls, lambda a: not inspect.ismethod(a))
        print('1', attr_)
        attr_ = filter(lambda a: not a[0].startswith('__'), attr_)
        print('2', attr_)
        attr_ = list(attr_)
        print('3', attr_)


class B(A):
    b = 20


if __name__ == '__main__':
    b_obj = B()
    b_obj.get_attribute()

输出：
1 {'__module__': '__main__', 'b': 20, '__doc__': None}
2 ['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'a', 'b', 'get_attribute']
3 ['__repr__', '__call__', '__getattribute__', '__setattr__', '__delattr__', '__init__', '__new__', 'mro', '__subclasses__', '__prepare__', '__instancecheck__', '__subclasscheck__', '__dir__', '__sizeof__', '__basicsize__', '__itemsize__', '__flags__', '__weakrefoffset__', '__base__', '__dictoffset__', '__mro__', '__name__', '__qualname__', '__bases__', '__module__', '__abstractmethods__', '__dict__', '__doc__', '__text_signature__', '__hash__', '__str__', '__lt__', '__le__', '__eq__', '__ne__', '__gt__', '__ge__', '__reduce_ex__', '__reduce__', '__subclasshook__', '__init_subclass__', '__format__', '__class__']
4 {'__module__': '__main__', 'b': 20, '__doc__': None}
5 {'cls': <class '__main__.B'>}
6 {'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <_frozen_importlib_external.SourceFileLoader object at 0x7fe80ce524f0>, '__spec__': None, '__annotations__': {}, '__builtins__': <module 'builtins' (built-in)>, '__file__': '/home/vubuntu/PycharmProjects/meiduo_project/test.py', '__cached__': None, 'inspect': <module 'inspect' from '/usr/lib/python3.8/inspect.py'>, 'A': <class '__main__.A'>, 'B': <class '__main__.B'>, 'b_obj': <__main__.B object at 0x7fe80cd93d00>}
********************
1 [('__class__', <class 'type'>), ('__delattr__', <slot wrapper '__delattr__' of 'object' objects>), ('__dict__', mappingproxy({'__module__': '__main__', 'b': 20, '__doc__': None})), ('__dir__', <method '__dir__' of 'object' objects>), ('__doc__', None), ('__eq__', <slot wrapper '__eq__' of 'object' objects>), ('__format__', <method '__format__' of 'object' objects>), ('__ge__', <slot wrapper '__ge__' of 'object' objects>), ('__getattribute__', <slot wrapper '__getattribute__' of 'object' objects>), ('__gt__', <slot wrapper '__gt__' of 'object' objects>), ('__hash__', <slot wrapper '__hash__' of 'object' objects>), ('__init__', <slot wrapper '__init__' of 'object' objects>), ('__init_subclass__', <built-in method __init_subclass__ of type object at 0x2595e20>), ('__le__', <slot wrapper '__le__' of 'object' objects>), ('__lt__', <slot wrapper '__lt__' of 'object' objects>), ('__module__', '__main__'), ('__ne__', <slot wrapper '__ne__' of 'object' objects>), ('__new__', <built-in method __new__ of type object at 0x90a5a0>), ('__reduce__', <method '__reduce__' of 'object' objects>), ('__reduce_ex__', <method '__reduce_ex__' of 'object' objects>), ('__repr__', <slot wrapper '__repr__' of 'object' objects>), ('__setattr__', <slot wrapper '__setattr__' of 'object' objects>), ('__sizeof__', <method '__sizeof__' of 'object' objects>), ('__str__', <slot wrapper '__str__' of 'object' objects>), ('__subclasshook__', <built-in method __subclasshook__ of type object at 0x2595e20>), ('__weakref__', <attribute '__weakref__' of 'A' objects>), ('a', 10), ('b', 20)]
2 <filter object at 0x7fe80cbfb070>
3 [('a', 10), ('b', 20)]