对keras训练过程中loss,val_loss,以及accuracy,val_accuracy的可视化
hist=model.fit_generator(generator=data_generator_reg(X=x_train,Y=[y_train_a,y_train_g],batch_size=batch_size),steps_per_epoch=train_num//batch_size,validation_data=(x_test,[y_test_a,y_test_g]),epochs