class A(object):
def sky(self):
print(id(self)) # 2839707071368
@classmethod
def person(cls):
return print(id(cls)) # 2839705905128
a = A()
print(id(a)) # 2839707071368
a.sky()
a.person()
print(id(A)) # 2839705905128
由此可见 slef 与实例化对象 a 内存地址相同
cls与 类A 的地址相同