object.__new__创建对象

# python一切皆对象

class Foo(object):

    def __init__(self, name, version=None):
        self.name = name
        self.version = version

    def __setstate__(self, state):
        self.name = state.get('name', 'LiShiChao')
        self.version = state.get('version', '0.0.1')


def main():
    obj = object.__new__(Foo)  # 创建一个空对象
    print(dir(Foo))

    # 给init赋值
    if hasattr(obj, '__setstate__'):
        obj.__setstate__({})
        print(obj.version)


if __name__ == '__main__':
    main()