human
Solve the following python programming problem given the following code:
def test_exempt_decorator(self) : 
    '
        Ensures @xframe_options_exempt properly instructs the
        XFrameOptionsMiddleware to NOT set the header.
        ' 
    @ xframe_options_exempt 
    def a_view(request) : 
        return HttpResponse () 
req = HttpRequest () 
    resp = a_view (req) 
    self.assertEqual (resp.get ('X-Frame-Options', None), None) 
    self.assertTrue (a_view.xframe_options_exempt) 
    r = XFrameOptionsMiddleware ().process_response (req, resp) 
    self.assertEqual (r.get ('X-Frame-Options', None), None) 

    
    

    Fix the buggy line: self.assertTrue (a_view.xframe_options_exempt)
assistant
#Here is Python program to fix the buggy line: self.

self.assertTrue (resp.xframe_options_exempt)