where i got confuse

Line 761 in ae10235

recon_batch, y_hat, mu, logvar, z = self(

i don"t understand why how can use like that ,there are no function infer.

This is indeed confusing, you could read this as self.forward(...). It has to do with the way PyTorch's forward function works, maybe this is useful: https://discuss.pytorch.org/t/any-different-between-model-input-and-model-forward-input/3690