缺少'train_data/seq.data'文件，Tensowflow2.0的Seq2seq版本

执行`python data_util.py `
返回：
```python
Traceback (most recent call last):
  File "data_util.py", line 69, in <module>
    lines = io.open(seq_train, encoding='UTF-8').readlines()
FileNotFoundError: [Errno 2] No such file or directory: 'train_data/seq.data'

```

已经解压train_data里的压缩包，但还是有这个问题