human
Solve the following python programming problem given the following code:
def _test_evacuate(self, req_subs, server_req, server_resp, expected_resp_code) : 
    self.uuid = self._post_server () 
    def fake_service_is_up(self, service) : 
        'Simulate validation of instance host is down.' 
        return False 
def fake_service_get_by_compute_host(self, context, host) : 
        'Simulate that given host is a valid host.' 
        return { 
            'host_name' : host, 
            'service' : 'compute', 
            'zone' : 'nova', 
} 
def fake_check_instance_exists(self, context, instance) : 
        'Simulate validation of instance does not exist.' 
        return False 
self.stub_out ('nova.servicegroup.api.API.service_is_up', fake_service_is_up) 
    self.stub_out ('nova.compute.api.HostAPI.service_get_by_compute_host', fake_service_get_by_compute_host) 
    self.stub_out ('nova.compute.manager.ComputeManager._check_instance_exists', fake_check_instance_exists) 
    response = self._do_post (('servers/%s/action' % self.uuid), server_req, req_subs) 
    if server_resp : 
        self._verify_response (server_resp, { 
            
}, fake_check_instance_exists, expected_resp_code) 
else : 
        self.assertEqual (expected_resp_code, response.status_code) 
        self.assertEqual ('', response.content) 

    
    

    Fix the buggy line: }, fake_check_instance_exists, expected_resp_code)
assistant
#Here is Python program to fix the buggy line: }, fake_check_instance_exists, expected_resp_code)
.

}, response, expected_resp_code)