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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _save_model(self, section):
 """ Save model in the logging directory """

        checkpoint_name = self.flags['LOGGING_DIRECTORY'] + 'part_%d' % section + '.ckpt'
        save_path = self.saver.save(self.sess, checkpoint_name)
        print("Model saved in file: %s" % save_path)