human
Solve the following python programming problem given the following code:
@ mock.patch.object (system_users, 'NARRATOR_USER', None) 
def testWelcomeUsers(self) : 
    'Test that users that are part of the "Welcome to Viewfinder" conversation are created.' 
    def _TestUser(email) : 
        identity = self._RunAsync (Identity.Query, self._client, ('Email:%s' % email), None) 
        self.assertEqual (identity.authority, 'Viewfinder') 
        user = self._RunAsync (User.Query, self._client, identity.user_id, None) 
        self.assertTrue (user.IsRegistered ()) 
        self.assertTrue (user.IsSystem ()) 
        self.assertEqual (user.email, email) 
        settings = self._RunAsync (AccountSettings.QueryByUser, self._client, identity.user_id, None) 
        self.assertEqual (settings.email_alerts, AccountSettings.EMAIL_NONE) 
        return (user.name, user.given_name, user.family_name) 
def _TestUpload(user, upload_request) : 
        cookie = self._GetSecureUserCookie (user, user.webapp_dev_id) 
        ep_select = self._tester.CreateEpisodeSelection (upload_request ['episode'] ['episode_id'], get_attributes = True, get_photos = True) 
        response_dict = self._tester.SendRequest ('query_episodes', cookie, { 
            'episodes' : [ep_select], 
}) 
        ep_dict = response_dict ['episodes'] [0] 
        self.assertEqual (len (upload_request ['photos']), len (ep_dict ['photos'])) 
        for ph_dict in response_dict ['episodes'] [0] ['photos'] : 
            for (suffix, size_attr) in (('.f', 'full_size'), ('.m', 'med_size'), ('.t', 'tn_size')) : 
                response = self._tester.GetPhotoImage (cookie, ep_dict ['episode_id'], ph_dict ['photo_id'], suffix) 
                self.assertEqual (len (response.body), ph_dict [size_attr]) 
self._RunAsync (CreateSystemUsers, _TestUser._client) 
    self.assertEqual (_TestUser ('narrator@emailscrubbed.com'), ('Viewfinder', 'Viewfinder', None)) 
    _TestUpload (system_users.NARRATOR_USER, system_users.NARRATOR_UPLOAD_PHOTOS) 

    
    

    Fix the buggy line: self._RunAsync (CreateSystemUsers, _TestUser._client)
assistant
#Here is Python code to fix the buggy line: self.

self._RunAsync (CreateSystemUsers, self._client)