def test_categorical_ensemble_basic_classifier(): np.random.seed(0) df_titanic_train, df_titanic_test = utils.get_titanic_binary_classification_dataset( ) column_descriptions = { 'survived': 'output', 'pclass': 'categorical', 'embarked': 'categorical', 'sex': 'categorical' } ml_predictor = Predictor(type_of_estimator='classifier', column_descriptions=column_descriptions) ml_predictor.train_categorical_ensemble(df_titanic_train, categorical_column='pclass', optimize_final_model=False) test_score = ml_predictor.score(df_titanic_test, df_titanic_test.survived) print('test_score') print(test_score) # Small sample sizes mean there's a fair bit of noise here assert -0.155 < test_score < -0.135
def test_categorical_ensembling_regression(model_name=None): np.random.seed(0) df_boston_train, df_boston_test = utils.get_boston_regression_dataset() column_descriptions = {'MEDV': 'output', 'CHAS': 'categorical'} ml_predictor = Predictor(type_of_estimator='regressor', column_descriptions=column_descriptions) ml_predictor.train_categorical_ensemble(df_boston_train, perform_feature_selection=True, model_names=model_name, categorical_column='CHAS') test_score = ml_predictor.score(df_boston_test, df_boston_test.MEDV) print('test_score') print(test_score) lower_bound = -4.2 assert lower_bound < test_score < -2.8
def test_feature_learning_categorical_ensembling_getting_single_predictions_regression( model_name=None): np.random.seed(0) df_boston_train, df_boston_test = utils.get_boston_regression_dataset() column_descriptions = {'MEDV': 'output', 'CHAS': 'categorical'} ml_predictor = Predictor(type_of_estimator='regressor', column_descriptions=column_descriptions) # NOTE: this is bad practice to pass in our same training set as our fl_data set, # but we don't have enough data to do it any other way df_boston_train, fl_data = train_test_split(df_boston_train, test_size=0.2) ml_predictor.train_categorical_ensemble(df_boston_train, model_names=model_name, feature_learning=True, fl_data=fl_data, categorical_column='CHAS') # print('Score on training data') # ml_predictor.score(df_boston_train, df_boston_train.MEDV) file_name = ml_predictor.save(str(random.random())) from brainless.utils.models.utils_models import load_ml_model saved_ml_pipeline = load_ml_model(file_name) # with open(file_name, 'rb') as read_file: # saved_ml_pipeline = dill.load(read_file) os.remove(file_name) try: keras_file_name = file_name[:-5] + '_keras_deep_learning_model.h5' os.remove(keras_file_name) except: pass df_boston_test_dictionaries = df_boston_test.to_dict('records') # 1. make sure the accuracy is the same predictions = [] for row in df_boston_test_dictionaries: predictions.append(saved_ml_pipeline.predict(row)) first_score = utils.calculate_rmse(df_boston_test.MEDV, predictions) print('first_score') print(first_score) # Make sure our score is good, but not unreasonably good lower_bound = -4.5 assert lower_bound < first_score < -3.4 # 2. make sure the speed is reasonable (do it a few extra times) data_length = len(df_boston_test_dictionaries) start_time = datetime.datetime.now() for idx in range(1000): row_num = idx % data_length saved_ml_pipeline.predict(df_boston_test_dictionaries[row_num]) end_time = datetime.datetime.now() duration = end_time - start_time print('duration.total_seconds()') print(duration.total_seconds()) # It's very difficult to set a benchmark for speed that will work across all machines. # On my 2013 bottom of the line 15" MacBook Pro, # this runs in about 0.8 seconds for 1000 predictions # That's about 1 millisecond per prediction # Assuming we might be running on a test box that's pretty weak, multiply by 3 # Also make sure we're not running unreasonably quickly assert 0.2 < duration.total_seconds() / 1.0 < 15 # 3. make sure we're not modifying the dictionaries # (the score is the same after running a few experiments as it is the first time) predictions = [] for row in df_boston_test_dictionaries: predictions.append(saved_ml_pipeline.predict(row)) second_score = utils.calculate_rmse(df_boston_test.MEDV, predictions) print('second_score') print(second_score) # Make sure our score is good, but not unreasonably good assert lower_bound < second_score < -3.4