class LowerAttrMetaClass_4(type):
    def __new__(cls, name, bases, dct):
        attrs = ((name, value) for name, value in dct.items() if not name.startswith('__'))
        lowercase_attr = dict((name.lower(), value) for name, value in attrs)
        return super(LowerAttrMetaClass_4, cls).__new__(cls, name, bases, lowercase_attr)

class MetaClassTest(object, metaclass=LowerAttrMetaClass_4):
    Say = "hello world"

    def __init__(self, name, age):
        super(MetaClassTest, self).__init__()
        self.name = name
        self.age = age

    def Run(self):
        print("MetaClassTest run method")

tmp_obj = MetaClassTest(name="zzz", age=20)

执行如上代码，总是报如下错误：
DeprecationWarning: class not set defining 'MetaClassTest' as . Was classcell propagated to type.new?
class MetaClassTest(object, metaclass=LowerAttrMetaClass_4):
Traceback (most recent call last):
File "E:/zzz/meta.py", line 286, in
tmp_obj = MetaClassTest(name="zzz", age=20)
TypeError: MetaClassTest() takes no arguments

请教：
（1）为什么会报 DeprecationWarning？
（2）为什么会报 MetaClassTest() takes no arguments，我明明传了参数进去的呀？