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Solve the following python programming problem given the following code:
def authorize_handler(self, f) : 
    "Authorization handler decorator.

        This decorator will sort the parameters and headers out, and
        pre validate everything::

            @app.route('/oauth/authorize', methods=['GET', 'POST'])
            @oauth.authorize_handler
            def authorize(*args, **kwargs):
                if request.method == 'GET':
                    # render a page for user to confirm the authorization
                    return render_template('oauthorize.html')

                confirm = request.form.get('confirm', 'no')
                return confirm == 'yes'
        " 
    @ wraps (f) 
    def decorated(* args, **kwargs) : 
        server = self.server 
        (uri, http_method, body, headers) = extract_params (True) 
        if (request.method in ('GET', 'HEAD')) : 
            redirect_uri = request.query.get ('redirect_uri', self.error_uri) 
            log.debug ('Found redirect_uri %s.', redirect_uri) 
            try : 
                ret = server.validate_authorization_request (uri, http_method, body, headers) 
                (scopes, credentials) = ret 
                kwargs ['scopes'] = scopes 
                kwargs.update (credentials) 
except oauth2.FatalClientError as e : 
                log.debug ('Fatal client error %r', e) 
                return redirect (e.in_uri (self.error_uri)) 
except oauth2.OAuth2Error as e : 
                log.debug ('OAuth2Error: %r', e) 
                return redirect (e.in_uri (redirect_uri)) 
else : 
            redirect_uri = request.params.get ('redirect_uri', self.error_uri) 
try : 
            rv = f (* args, ** kwargs) 
except oauth2.FatalClientError as e : 
            log.debug ('Fatal client error %r', e) 
            return redirect (e.in_uri (self.error_uri)) 
except oauth2.OAuth2Error as e : 
            log.debug ('OAuth2Error: %r', e) 
            return redirect (e.in_uri (redirect_uri)) 
if (not isinstance (rv, bool)) : 
            return rv 
if (not rv) : 
            e = oauth2.AccessDeniedError...

    
    

    Fix the buggy line: return self
assistant
#Here is Python program to fix the buggy line: return self
.

return def decorated(