def get_model_pos(model_name_list):
    """ Args: model relative path
        Return: relative path of all related files
    """
    data_path = 'pos/data/'
    ckpt_path = 'pos/ckpt/'
    data_files = ['word_to_id', 'tag_to_id']
    ckpt_files = ['checkpoint', 'pos.ckpt.data-00000-of-00001',
        'pos.ckpt.index', 'pos.ckpt.meta']
    model_pos = []
    for model_name in model_name_list:
        for data_file in data_files:
            relative_data_file_path = data_path + model_name + '/' + data_file
            model_pos.append((relative_data_file_path, relative_data_file_path)
                )
        for ckpt_file in ckpt_files:
            relative_ckpt_file_path = ckpt_path + model_name + '/' + ckpt_file
            model_pos.append((relative_ckpt_file_path, relative_ckpt_file_path)
                )
    return model_pos
