A issue about the random seed set

[SZhanZ]

Dear authors, excellent work on this project~ I have a specific inquiry regarding the maintenance of randomness at your codes. I've read the code and connot find the segment where you set random seed. What's more, at the begining of each epoch, I notice that you do not reset the seed to data_sampler, which puzzles me a lot. Could you help to clarify how your random seed codes achieve? Thanks in advance~