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                                            zhangyps

need help

![image](https://user-images.githubusercontent.com/82881966/192183483-5cabe34a-857a-41f9-923b-51f88752f74e.png) ![image](https://user-images.githubusercontent.com/82881966/192183518-d4ddb6d6-9e01-40ba-812e-20cb9c480112.png)

loss!

why the loss is always nan??

train_net.py

I can run test_net.py and demo.py successfully, but the train_net.py can not be run, the error is 'NoneType' object has no attribute 'astype' , i do not know the resaon,help!