SimpleClassifier SimpleClassifier 1. pipeline 1.1 data 1.2 model 1.3 forward(similar with model) 1.4 loss 1.5 backward 1.6 weight/bias update 1.7 metric 1.8 export 2.0 dataset 1. pipeline 1.1 data dataset transform dataloader 1.2 model backbone 1.3 forward(similar with model) 1.4 loss ce loss 1.5 backward backward 1.6 weight/bias update optimizer sgd 1.7 metric 1.8 export 2.0 dataset text direction classify dataset