如何从类中获取常量,排除可能来自父母的所有常量？

import inspect

class Parent:
    CONST_PARENT = "parent_const"

class Child(Parent):
    CONST_CHILD = "child_const"

def get_constants(cls):
    constants = {}
    for name, value in inspect.getmembers(cls, lambda x: isinstance(x, type(cls))):
        if name.startswith("CONST_"):
            constants[name] = value
    return constants

def get_child_constants(cls):
    child_constants = {}
    for name, value in get_constants(cls).items():
        if not hasattr(Parent, name):
            child_constants[name] = value
    return child_constants

child_constants = get_child_constants(Child)
print(child_constants)