model.py 文件源码

def train_model(model, args, X_train, X_valid, y_train, y_valid):
    """
    Train the model
    """
    checkpoint = ModelCheckpoint('model-{epoch:03d}.h5',
                                 monitor='val_loss',
                                 verbose=0,
                                 save_best_only=args.save_best_only,
                                 mode='auto')

    model.compile(loss='mean_squared_error', optimizer=Adam(lr=args.learning_rate))

    model.fit_generator(batch_generator(args.data_dir, X_train, y_train, args.batch_size, True),
                        args.samples_per_epoch,
                        args.nb_epoch,
                        max_q_size=1,
                        validation_data=batch_generator(args.data_dir, X_valid, y_valid, args.batch_size, False),
                        nb_val_samples=len(X_valid),
                        callbacks=[checkpoint],
                        verbose=1)