这个python 装饰器代码是什么意思？
在看openstack nova 的代码的时候，看到了这个问题，不知道这个函数代码是什么意思？这个是类作为一个函数的装饰器，是怎么装饰的？
class wsgify(object):
RequestClass = Request
def __init__(self, func=None, RequestClass=None,
args=(), kwargs=None, middleware_wraps=None):
self.func = func
if (RequestClass is not None
and RequestClass is not self.RequestClass):
self.RequestClass = RequestClass
self.args = tuple(args)
if kwargs is None:
kwargs = {}
self.kwargs = kwargs
self.middleware_wraps = middleware_wraps
**@webob.dec.wsgify(RequestClass=wsgi.Request)
def __call__(self, req):**
if os.path.normpath(req.path_info) == "/":
resp = base.ec2_md_print(base.VERSIONS + ["latest"])
req.response.body = resp
req.response.content_type = base.MIME_TYPE_TEXT_PLAIN
return req.response
请问下这个装饰器是什么意思啊？
