SimpleClassifierSimpleClassifier1. pipeline1.1 data1.2 model1.3 forward(similar with model)1.4 loss1.5 backward1.6 weight/bias update1.7 metric1.8 export2.0 dataset1. pipeline1.1 datadataset transformdataloader1.2 modelbackbone1.3 forward(similar with model)1.4 lossce loss1.5 backwardbackward1.6 weight/bias updateoptimizersgd1.7 metric1.8 export2.0 datasettext direction classify dataset