new_contents: import theanets
  import numpy as np
  
  import util
  
  
  class TestExperiment(util.MNIST):
      def test_create_autoencoder(self):
          exp = theanets.Experiment(
              theanets.Autoencoder, layers=(self.DIGIT_SIZE, 2, self.DIGIT_SIZE))
          assert isinstance(exp.network, theanets.Autoencoder)
  
      def test_create_classifier(self):
          exp = theanets.Experiment(
              theanets.Classifier, layers=(self.DIGIT_SIZE, 2, 3))
          assert isinstance(exp.network, theanets.Classifier)
  
      def test_create_autoencoder(self):
          exp = theanets.Experiment(
              theanets.Regressor, layers=(self.DIGIT_SIZE, 2, 4))
          assert isinstance(exp.network, theanets.Regressor)
  
subject: Add a few basic tests for Experiment code.