How to use the tasklib.backends.TaskWarrior function in tasklib

def get_taskwarrior(self, **kwargs):
        tw_kwargs = dict(
            data_location=self.tmp,
            taskrc_location='/',
        )
        tw_kwargs.update(kwargs)
        return TaskWarrior(**tw_kwargs)

def upload_new_tw_tasks(trello_lists, project_name, board_name, todo_list_name, doing_list_name, done_list_name):
    """
    Upload new TaskWarrior tasks that never uploaded before

    :trello_lists: the set of lists
    :project_name: the project name
    :board_name: the name of Trello board
    :todo_list_name: name of list for todo taks
    :doing_list_name: name of list for active tasks
    :done_list_name: name of list for done tasks
    """
    task_warrior = TaskWarrior(taskrc_location=taskwarrior_taskrc_location, data_location=taskwarrior_data_location)
    tw_pending_tasks   = task_warrior.tasks.pending().filter(project=project_name, trelloid=None)
    tw_completed_tasks = task_warrior.tasks.completed().filter(project=project_name, trelloid=None)
    for tw_pending_task in tw_pending_tasks:
        if tw_pending_task.active:
            upload_tw_task(tw_pending_task, get_trello_list(board_name, trello_lists, doing_list_name))
            tw_pending_task['trellolistname'] = doing_list_name
            tw_pending_task.save()
        else:
            if tw_pending_task['trellolistname']:
                upload_tw_task(tw_pending_task, get_trello_list(board_name, trello_lists, tw_pending_task['trellolistname']))
            else:
                upload_tw_task(tw_pending_task, get_trello_list(board_name, trello_lists, todo_list_name))
                tw_pending_task['trellolistname'] = todo_list_name
                tw_pending_task.save()
    for tw_completed_task in tw_completed_tasks:
        upload_tw_task(tw_completed_task, get_trello_list(board_name, trello_lists, done_list_name))

def get_tw_task_by_trello_id(trello_id):
    """
    Get a task by Trello ID
    Trello ID must be unique, if not this raise an error

    :project_name: the project name
    :trello_id: Trello card ID
    """
    tw_tasks = TaskWarrior(taskrc_location=taskwarrior_taskrc_location, data_location=taskwarrior_data_location).tasks.filter(trelloid=trello_id)
    if len(tw_tasks) == 0:
        return None
    elif len(tw_tasks) == 1:
        return tw_tasks[0]
    else:
        raise ValueError('Duplicated Trello ID {0} in Taskwarrior tasks. Trello IDs must be unique, please fix it before sync.'.format(trello_id))

def sync_trello_tw(trello_lists, project_name, board_name, todo_list_name, doing_list_name, done_list_name):
    """
    Download from Trello all cards and sync with TaskWarrior tasks

    :trello_lists: the set of lists
    :project_name: the project name
    :board_name: the name of Trello board
    :todo_list_name: name of list for todo taks
    :doing_list_name: name of list for active tasks
    :done_list_name: name of list for done tasks
    """
    task_warrior = TaskWarrior(taskrc_location=taskwarrior_taskrc_location, data_location=taskwarrior_data_location)
    # Get all Task Warrior deleted tasks and seek for ones that have trelloid (locally deleted)
    tw_deleted_tasks = task_warrior.tasks.filter(project=project_name,status='deleted')
    for tw_deleted_task in tw_deleted_tasks:
        if tw_deleted_task['trelloid']:
            delete_trello_card(tw_deleted_task['trelloid'])
            tw_deleted_task['trelloid'] = None
            tw_deleted_task.save()
    # Compare and sync Trello with Task Warrior
    trello_dic_cards = get_trello_dic_cards(trello_lists)
    trello_cards_ids = []
    for list_name in trello_dic_cards:
        for trello_card in trello_dic_cards[list_name]:
            # Fech all data from card
            trello_card.fetch(False)
            trello_cards_ids.append(trello_card.id)
            tw_task = get_tw_task_by_trello_id(trello_card.id)