human
Solve the following python programming problem given the following code:
def kill_tasks(self, app_id, scale = False, host = None, batch_size = 0, batch_delay = 0) : 
    'Kill all tasks belonging to app.

        :param str app_id: application ID
        :param bool scale: if true, scale down the app by the number of tasks killed
        :param str host: if provided, only terminate tasks on this Mesos slave
        :param int batch_size: if non-zero, terminate tasks in groups of this size
        :param int batch_delay: time (in seconds) to wait in between batched kills. If zero, automatically determine

        :returns: list of killed tasks
        :rtype: list[:class:`marathon.models.task.MarathonTask`]
        ' 
    def batch(iterable, size) : 
        sourceiter = iter (iterable) 
        while True : 
            batchiter = itertools.islice (sourceiter, size) 
            (yield itertools.chain ([next (batchiter)], batchiter)) 
if (batch_size == 0) : 
        params = { 
            'scale' : scale, 
} 
        if host : 
            params ['host'] = host 
response = self._do_request ('DELETE', '/v2/apps/{app_id}/tasks'.format (app_id = app_id), params) 
        if ('tasks' in response.json ()) : 
            return self._parse_response (response, MarathonTask, is_list = True, resource_name = 'tasks') 
else : 
            return response.json () 
else : 
        tasks = (self.list_tasks (app_id, host = host) if host else self.list_tasks (app_id)) 
        for tbatch in batch (tasks, batch_size) : 
            killed_tasks = [self.kill_task (scale, t.id, scale = scale) for t in tbatch] 
            killed_task_ids = set ((t.id for t in killed_tasks)) 
            running_task_ids = killed_task_ids 
            while killed_task_ids.intersection (running_task_ids) : 
                time.sleep (1) 
                running_task_ids = set ((t.id for t in self.get_app (app_id).tasks)) 
if (batch_delay == 0) : 
                desired_instances = self.get_app (app_id).instances 
                running_instances = 0 
                while (running_instances <...

    
    

    Fix the buggy line: killed_tasks = [self.kill_task (scale, t.id, scale = scale) for t in tbatch]
assistant
#Here is Python code to fix the buggy line: killed_tasks = [self.

killed_tasks = [self.kill_task (app_id, t.id, scale = scale) for t in tbatch]