如何获取类属性列表

class MyClass:
    attr1 = "value1"
    attr2 = "value2"

attr_list = dir(MyClass)
print(attr_list)

['__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__', 'attr1', 'attr2']

class MyClass:
    attr1 = "value1"
    attr2 = "value2"

attr_dict = vars(MyClass)
attr_list = list(attr_dict.keys())
print(attr_list)

['__module__', 'attr1', 'attr2', '__dict__', '__weakref__', '__doc__']

class MyClass:
    attr1 = "value1"
    attr2 = "value2"

attr_dict = MyClass.__dict__
attr_list = list(attr_dict.keys())
print(attr_list)

['__module__', 'attr1', 'attr2', '__dict__', '__weakref__', '__doc__']