for [xb](https://docs.pytorch.org/docs/stable/tensors.html#torch.Tensor "torch.Tensor"),[yb](https://docs.pytorch.org/docs/stable/tensors.html#torch.Tensor "torch.Tensor") in train_dl:
    [pred](https://docs.pytorch.org/docs/stable/tensors.html#torch.Tensor "torch.Tensor") = [model](https://docs.pytorch.org/docs/stable/generated/torch.nn.Sequential.html#torch.nn.Sequential "torch.nn.Sequential")([xb](https://docs.pytorch.org/docs/stable/tensors.html#torch.Tensor "torch.Tensor"))