训练集创建数据不成功

[king-no-crown]

我在D:\Pycharm\project\ecg-master\examples\irhythm 文件夹下 调用build_datasets.py文件生成训练集。结果显示：
D:/Pycharm/project/ecg-master/examples/irhythm/CARDIOL_MAY_2017\label_review/CARDIOL_MAY_2017
D:/Pycharm/project/ecg-master/examples/irhythm/CARDIOL_MAY_2017\batches/kids_blacklist
D:/Pycharm/project/ecg-master/examples/irhythm/CARDIOL_MAY_2017\batches/vf_blacklist
Constructing train...
Constructing dev...
0it [00:00, ?it/s]
Constructing test...
0it [00:00, ?it/s]
0it [00:00, ?it/s]
Constructing test...
Constructing test...
0it [00:00, ?it/s]
0it [00:00, ?it/s]
0it [00:00, ?it/s]
Constructing test...
Constructing test...
0it [00:00, ?it/s]
Constructing test...
0it [00:00, ?it/s]Constructing test...
0it [00:00, ?it/s]
0it [00:00, ?it/s]
在相应文件夹中出现了5个json数据以及其他，但是里面全部是空白？
请问一下是什么原因呢？