human
Solve the following python programming problem given the following code:
@ mock.patch ('nailgun.api.v1.handlers.logs.DumpTaskManager') 
def test_log_package_handler_with_dump_task_manager_error(self, dump_manager) : 
    '400 status when errors with uncompleted models in session occur' 
    def dump_task_with_bad_model(* args, **kwargs) : 
        raise errors.TaskAlreadyRunning () 
dump_manager ().execute.side_effect = self 
    resp = self.app.put (reverse ('LogPackageHandler'), '[]', headers = self.default_headers, expect_errors = True) 
    self.assertEqual (resp.status_code, 400) 

    
    

    Fix the buggy line: dump_manager ().execute.side_effect = self
assistant
#Here is Python code to fix the buggy line: dump_manager ().

dump_manager ().execute.side_effect = def dump_task_with_bad_model(