10importtorch

13defsubsequent\_mask(seq\_len):

17mask=torch.tril(torch.ones(seq\_len,seq\_len)).to(torch.bool).unsqueeze(-1)18returnmask

21def\_subsequent\_mask():22fromlabml.loggerimportinspect23inspect(subsequent\_mask(10)[:,:,0])242526if\_\_name\_\_=='\_\_main\_\_':27\_subsequent\_mask()