def test_partial_dependence_baseline():
X = pd.DataFrame([[1, 0], [0, 1]])
y = pd.Series([0, 1])
pipeline = BinaryClassificationPipeline(component_graph=["Baseline Classifier"], parameters={})
pipeline.fit(X, y)
with pytest.raises(ValueError, match="Partial dependence plots are not supported for Baseline pipelines"):
partial_dependence(pipeline, X, features=0, grid_resolution=20)
def test_submit_scoring_jobs_multiple(self):
""" Test that scoring multiple pipelines using the parallel engine produces the
same results as the sequential engine. """
X, y = self.X_y_binary
pipelines = [BinaryClassificationPipeline(component_graph=["Logistic Regression Classifier"],
parameters={"Logistic Regression Classifier": {"n_jobs": 1}}),
BinaryClassificationPipeline(component_graph=["Baseline Classifier"]),
BinaryClassificationPipeline(component_graph=["SVM Classifier"])]
def score_pipelines(pipelines, engine):
futures = []
for pipeline in pipelines:
futures.append(engine.submit_training_job(X=ww.DataTable(X), y=ww.DataColumn(y),
automl_config=automl_data, pipeline=pipeline))
pipelines = [f.get_result() for f in futures]
futures = []
for pipeline in pipelines:
futures.append(engine.submit_scoring_job(X=ww.DataTable(X), y=ww.DataColumn(y),
automl_config=automl_data, pipeline=pipeline,
objectives=[automl_data.objective]))
results = [f.get_result() for f in futures]
return results
par_eval_results = score_pipelines(pipelines, DaskEngine(client=self.client))
par_scores = [s["Log Loss Binary"] for s in par_eval_results]
seq_eval_results = score_pipelines(pipelines, SequentialEngine())
seq_scores = [s["Log Loss Binary"] for s in seq_eval_results]
# Check there are the proper number of pipelines and all their scores are same.
assert len(par_eval_results) == len(pipelines)
assert set(par_scores) == set(seq_scores)
def test_submit_training_jobs_multiple(self):
""" Test that training multiple pipelines using the parallel engine produces the
same results as the sequential engine. """
X, y = self.X_y_binary
pipelines = [BinaryClassificationPipeline(component_graph=["Logistic Regression Classifier"],
parameters={"Logistic Regression Classifier": {"n_jobs": 1}}),
BinaryClassificationPipeline(component_graph=["Baseline Classifier"]),
BinaryClassificationPipeline(component_graph=["SVM Classifier"])]
def fit_pipelines(pipelines, engine):
futures = []
for pipeline in pipelines:
futures.append(engine.submit_training_job(X=X, y=y, automl_config=automl_data, pipeline=pipeline))
results = [f.get_result() for f in futures]
return results
# Verify all pipelines are trained and fitted.
seq_pipelines = fit_pipelines(pipelines, SequentialEngine())
for pipeline in seq_pipelines:
assert pipeline._is_fitted
# Verify all pipelines are trained and fitted.
par_pipelines = fit_pipelines(pipelines, DaskEngine(client=self.client))
for pipeline in par_pipelines:
assert pipeline._is_fitted
# Ensure sequential and parallel pipelines are equivalent
assert len(par_pipelines) == len(seq_pipelines)
for par_pipeline in par_pipelines:
assert par_pipeline in seq_pipelines
def _method(hyperparameters=['default', 'other']):
class MockEstimator(Estimator):
name = "Mock Classifier"
model_family = ModelFamily.RANDOM_FOREST
supported_problem_types = [
ProblemTypes.BINARY, ProblemTypes.MULTICLASS
]
if isinstance(hyperparameters,
(list, tuple, Real, Categorical, Integer)):
hyperparameter_ranges = {'dummy_parameter': hyperparameters}
else:
hyperparameter_ranges = {'dummy_parameter': [hyperparameters]}
def __init__(self,
dummy_parameter='default',
n_jobs=-1,
random_seed=0,
**kwargs):
super().__init__(parameters={
'dummy_parameter': dummy_parameter,
**kwargs, 'n_jobs': n_jobs
},
component_obj=None,
random_seed=random_seed)
return [
BinaryClassificationPipeline([MockEstimator]),
BinaryClassificationPipeline([MockEstimator]),
BinaryClassificationPipeline([MockEstimator])
]
def test_partial_dependence_respect_grid_resolution():
X, y = load_fraud(1000)
pl = BinaryClassificationPipeline(component_graph=["DateTime Featurization Component", "One Hot Encoder", "Random Forest Classifier"])
pl.fit(X, y)
dep = partial_dependence(pl, X, features="amount", grid_resolution=20)
assert dep.shape[0] == 20
assert dep.shape[0] != max(X.select('categorical').describe().loc["nunique"]) + 1
dep = partial_dependence(pl, X, features="provider", grid_resolution=20)
assert dep.shape[0] == X['provider'].to_series().nunique()
assert dep.shape[0] != max(X.select('categorical').describe().loc["nunique"]) + 1
def test_graph_partial_dependence_regression_date_order(X_y_binary):
pytest.importorskip('plotly.graph_objects', reason='Skipping plotting test because plotly not installed')
X, y = X_y_binary
pipeline = BinaryClassificationPipeline(component_graph=['Imputer', 'One Hot Encoder', 'DateTime Featurization Component', 'Standard Scaler', 'Logistic Regression Classifier'])
X = pd.DataFrame(X, columns=[str(i) for i in range(X.shape[1])])
y = pd.Series(y)
dt_series = pd.Series(pd.date_range('20200101', periods=X.shape[0])).sample(frac=1).reset_index(drop=True)
X['dt_column'] = pd.to_datetime(dt_series, errors='coerce')
pipeline.fit(X, y)
fig = graph_partial_dependence(pipeline, X, features='dt_column', grid_resolution=5)
plot_data = fig.to_dict()['data'][0]
assert plot_data['type'] == 'scatter'
assert plot_data['x'].tolist() == list(pd.date_range('20200101', periods=X.shape[0]))
def test_generate_code_pipeline_with_custom_components():
class CustomTransformer(Transformer):
name = "My Custom Transformer"
hyperparameter_ranges = {}
def __init__(self, random_seed=0):
parameters = {}
super().__init__(parameters=parameters,
component_obj=None,
random_seed=random_seed)
class CustomEstimator(Estimator):
name = "My Custom Estimator"
hyperparameter_ranges = {}
supported_problem_types = [
ProblemTypes.BINARY, ProblemTypes.MULTICLASS
]
model_family = ModelFamily.NONE
def __init__(self, random_arg=False, random_seed=0):
parameters = {'random_arg': random_arg}
super().__init__(parameters=parameters,
component_obj=None,
random_seed=random_seed)
mock_pipeline_with_custom_components = BinaryClassificationPipeline(
[CustomTransformer, CustomEstimator])
expected_code = "from evalml.pipelines.binary_classification_pipeline import BinaryClassificationPipeline\n" \
"pipeline = BinaryClassificationPipeline(component_graph=[CustomTransformer, CustomEstimator], " \
"parameters={'My Custom Estimator':{'random_arg': False}}, random_seed=0)"
pipeline = generate_pipeline_code(mock_pipeline_with_custom_components)
assert pipeline == expected_code
def test_partial_dependence_xgboost_feature_names(problem_type, has_minimal_dependencies,
X_y_binary, X_y_multi, X_y_regression):
if has_minimal_dependencies:
pytest.skip("Skipping because XGBoost not installed for minimal dependencies")
if problem_type == ProblemTypes.REGRESSION:
pipeline = RegressionPipeline(component_graph=['Simple Imputer', 'XGBoost Regressor'],
parameters={'XGBoost Classifier': {'nthread': 1}})
X, y = X_y_regression
elif problem_type == ProblemTypes.BINARY:
pipeline = BinaryClassificationPipeline(component_graph=['Simple Imputer', 'XGBoost Classifier'],
parameters={'XGBoost Classifier': {'nthread': 1}})
X, y = X_y_binary
elif problem_type == ProblemTypes.MULTICLASS:
pipeline = MulticlassClassificationPipeline(component_graph=['Simple Imputer', 'XGBoost Classifier'],
parameters={'XGBoost Classifier': {'nthread': 1}})
X, y = X_y_multi
X = pd.DataFrame(X)
X = X.rename(columns={0: '<[0]'})
pipeline.fit(X, y)
part_dep = partial_dependence(pipeline, X, features="<[0]", grid_resolution=20)
check_partial_dependence_dataframe(pipeline, part_dep)
assert not part_dep.isnull().all().all()
part_dep = partial_dependence(pipeline, X, features=1, grid_resolution=20)
check_partial_dependence_dataframe(pipeline, part_dep)
assert not part_dep.isnull().all().all()
def test_stacked_different_input_pipelines_regression():
input_pipelines = [
RegressionPipeline([RandomForestRegressor]),
BinaryClassificationPipeline([RandomForestClassifier])
]
with pytest.raises(ValueError,
match="All pipelines must have the same problem type."):
StackedEnsembleRegressor(input_pipelines=input_pipelines)
def test_evaluate_pipeline_handles_ensembling_indices(
mock_fit, mock_score, dummy_binary_pipeline_class,
stackable_classifiers):
X = ww.DataTable(pd.DataFrame({"a": [i for i in range(100)]}))
y = ww.DataColumn(pd.Series([i % 2 for i in range(100)]))
automl = AutoMLSearch(X_train=X,
y_train=y,
problem_type='binary',
max_batches=19,
ensembling=True,
_ensembling_split_size=0.25)
training_indices, ensembling_indices, _, _ = split_data(
ww.DataTable(np.arange(X.shape[0])),
y,
problem_type='binary',
test_size=0.25,
random_seed=0)
training_indices, ensembling_indices = training_indices.to_dataframe(
)[0].tolist(), ensembling_indices.to_dataframe()[0].tolist()
pipeline1 = dummy_binary_pipeline_class({'Mock Classifier': {'a': 1}})
_ = evaluate_pipeline(pipeline1, automl, X, y, logger=MagicMock())
# check the fit length is correct, taking into account the data splits
assert len(mock_fit.call_args[0][0]) == int(2 / 3 * len(training_indices))
input_pipelines = [
BinaryClassificationPipeline([classifier])
for classifier in stackable_classifiers
]
ensemble = BinaryClassificationPipeline(
[StackedEnsembleClassifier],
parameters={
"Stacked Ensemble Classifier": {
"input_pipelines": input_pipelines,
"n_jobs": 1
}
})
_ = evaluate_pipeline(ensemble, automl, X, y, logger=MagicMock())
assert len(mock_fit.call_args[0][0]) == int(2 / 3 *
len(ensembling_indices))
def test_generate_code_pipeline_json_with_objects():
class CustomEstimator(Estimator):
name = "My Custom Estimator"
hyperparameter_ranges = {}
supported_problem_types = [
ProblemTypes.BINARY, ProblemTypes.MULTICLASS
]
model_family = ModelFamily.NONE
def __init__(self, random_arg=False, numpy_arg=[], random_seed=0):
parameters = {'random_arg': random_arg, 'numpy_arg': numpy_arg}
super().__init__(parameters=parameters,
component_obj=None,
random_seed=random_seed)
component_graph = ['Imputer', CustomEstimator]
pipeline = BinaryClassificationPipeline(
component_graph,
custom_name="Mock Binary Pipeline with Transformer",
parameters={'My Custom Estimator': {
'numpy_arg': np.array([0])
}})
generated_pipeline_code = generate_pipeline_code(pipeline)
assert generated_pipeline_code == "from evalml.pipelines.binary_classification_pipeline import BinaryClassificationPipeline\n" \
"pipeline = BinaryClassificationPipeline(component_graph=['Imputer', CustomEstimator], " \
"parameters={'Imputer':{'categorical_impute_strategy': 'most_frequent', 'numeric_impute_strategy': 'mean', 'categorical_fill_value': None, 'numeric_fill_value': None}, " \
"'My Custom Estimator':{'random_arg': False, 'numpy_arg': array([0])}}, custom_name='Mock Binary Pipeline with Transformer', random_seed=0)"
pipeline = BinaryClassificationPipeline(
component_graph,
custom_name="Mock Binary Pipeline with Transformer",
parameters={'My Custom Estimator': {
'random_arg': Imputer()
}})
generated_pipeline_code = generate_pipeline_code(pipeline)
assert generated_pipeline_code == "from evalml.pipelines.binary_classification_pipeline import BinaryClassificationPipeline\n" \
"pipeline = BinaryClassificationPipeline(component_graph=['Imputer', CustomEstimator], " \
"parameters={'Imputer':{'categorical_impute_strategy': 'most_frequent', 'numeric_impute_strategy': 'mean', 'categorical_fill_value': None, 'numeric_fill_value': None}, " \
"'My Custom Estimator':{'random_arg': Imputer(categorical_impute_strategy='most_frequent', numeric_impute_strategy='mean', categorical_fill_value=None, numeric_fill_value=None), 'numpy_arg': []}}, " \
"custom_name='Mock Binary Pipeline with Transformer', random_seed=0)"
def test_submit_scoring_job_single(self):
""" Test that scoring a single pipeline using the parallel engine produces the
same results as simply running the score_pipeline function. """
X, y = self.X_y_binary
pipeline = BinaryClassificationPipeline(component_graph=["Logistic Regression Classifier"],
parameters={"Logistic Regression Classifier": {"n_jobs": 1}})
engine = DaskEngine(client=self.client)
objectives = [automl_data.objective]
pipeline_future = engine.submit_training_job(X=ww.DataTable(X), y=ww.DataColumn(y),
automl_config=automl_data, pipeline=pipeline)
pipeline = pipeline_future.get_result()
pipeline_score_future = engine.submit_scoring_job(X=ww.DataTable(X), y=ww.DataColumn(y),
automl_config=automl_data, pipeline=pipeline,
objectives=objectives)
assert isinstance(pipeline_score_future, DaskComputation)
pipeline_score = pipeline_score_future.get_result()
original_pipeline_score = pipeline.score(X=X, y=y, objectives=objectives)
assert not np.isnan(pipeline_score["Log Loss Binary"])
assert pipeline_score == original_pipeline_score
def test_submit_evaluate_jobs_multiple(self):
""" Test that evaluating multiple pipelines using the parallel engine produces the
same results as the sequential engine. """
X, y = self.X_y_binary
pipelines = [BinaryClassificationPipeline(component_graph=["Logistic Regression Classifier"],
parameters={"Logistic Regression Classifier": {"n_jobs": 1}}),
BinaryClassificationPipeline(component_graph=["Baseline Classifier"]),
BinaryClassificationPipeline(component_graph=["SVM Classifier"])]
def eval_pipelines(pipelines, engine):
futures = []
for pipeline in pipelines:
futures.append(engine.submit_evaluation_job(X=ww.DataTable(X), y=ww.DataColumn(y),
automl_config=automl_data, pipeline=pipeline))
results = [f.get_result() for f in futures]
return results
par_eval_results = eval_pipelines(pipelines, DaskEngine(client=self.client))
par_dicts = [s.get("scores") for s in par_eval_results]
par_scores = [s["cv_data"][0]["mean_cv_score"] for s in par_dicts]
par_pipelines = [s.get("pipeline") for s in par_eval_results]
seq_eval_results = eval_pipelines(pipelines, SequentialEngine())
seq_dicts = [s.get("scores") for s in seq_eval_results]
seq_scores = [s["cv_data"][0]["mean_cv_score"] for s in seq_dicts]
seq_pipelines = [s.get("pipeline") for s in seq_eval_results]
# Ensure all pipelines are fitted.
assert all([s._is_fitted for s in par_pipelines])
# Ensure the scores in parallel and sequence are same
assert set(par_scores) == set(seq_scores)
assert not any([np.isnan(s) for s in par_scores])
# Ensure the parallel and sequence pipelines match
assert len(par_pipelines) == len(seq_pipelines)
for par_pipeline in par_pipelines:
assert par_pipeline in seq_pipelines
def test_compute_shap_values_catches_shap_tree_warnings(mock_tree_explainer, mock_debug, X_y_binary, caplog):
X, y = X_y_binary
pipeline = BinaryClassificationPipeline(["Random Forest Classifier"])
def raise_warning_from_shap(estimator, feature_perturbation):
warnings.warn("Shap raised a warning!")
mock = MagicMock()
mock.shap_values.return_value = np.zeros(10)
return mock
mock_tree_explainer.side_effect = raise_warning_from_shap
_ = _compute_shap_values(pipeline, pd.DataFrame(X))
mock_debug.debug.assert_called_with("_compute_shap_values TreeExplainer: Shap raised a warning!")
def test_submit_training_job_single(self):
""" Test that training a single pipeline using the parallel engine produces the
same results as simply running the train_pipeline function. """
X, y = self.X_y_binary
engine = DaskEngine(client=self.client)
pipeline = BinaryClassificationPipeline(component_graph=["Logistic Regression Classifier"],
parameters={"Logistic Regression Classifier": {"n_jobs": 1}})
# Verify that engine fits a pipeline
pipeline_future = engine.submit_training_job(X=X, y=y, automl_config=automl_data, pipeline=pipeline)
dask_pipeline_fitted = pipeline_future.get_result()
assert dask_pipeline_fitted._is_fitted
# Verify parallelization has no effect on output of function
original_pipeline_fitted = train_pipeline(pipeline, X, y, optimize_thresholds=automl_data.optimize_thresholds,
objective=automl_data.objective)
assert dask_pipeline_fitted == original_pipeline_fitted
assert dask_pipeline_fitted.predict(X) == original_pipeline_fitted.predict(X)
def test_generate_code_pipeline():
custom_hyperparameters = {
"Imputer": {
"numeric_impute_strategy": 'most_frequent'
}
}
binary_pipeline = BinaryClassificationPipeline(
['Imputer', 'Random Forest Classifier'],
custom_hyperparameters=custom_hyperparameters)
expected_code = "from evalml.pipelines.binary_classification_pipeline import BinaryClassificationPipeline\n" \
"pipeline = BinaryClassificationPipeline(component_graph=['Imputer', 'Random Forest Classifier'], " \
"parameters={'Imputer':{'categorical_impute_strategy': 'most_frequent', 'numeric_impute_strategy': 'mean', 'categorical_fill_value': None, 'numeric_fill_value': None}, " \
"'Random Forest Classifier':{'n_estimators': 100, 'max_depth': 6, 'n_jobs': -1}}, custom_hyperparameters={'Imputer':{'numeric_impute_strategy': 'most_frequent'}}, random_seed=0)"
pipeline = generate_pipeline_code(binary_pipeline)
assert expected_code == pipeline
regression_pipeline = RegressionPipeline(
['Imputer', 'Random Forest Regressor'],
custom_name="Mock Regression Pipeline")
expected_code = "from evalml.pipelines.regression_pipeline import RegressionPipeline\n" \
"pipeline = RegressionPipeline(component_graph=['Imputer', 'Random Forest Regressor'], parameters={'Imputer':{'categorical_impute_strategy': 'most_frequent', 'numeric_impute_strategy': 'mean', 'categorical_fill_value': None, 'numeric_fill_value': None}, " \
"'Random Forest Regressor':{'n_estimators': 100, 'max_depth': 6, 'n_jobs': -1}}, custom_name='Mock Regression Pipeline', random_seed=0)"
pipeline = generate_pipeline_code(regression_pipeline)
assert pipeline == expected_code
regression_pipeline_with_params = RegressionPipeline(
['Imputer', 'Random Forest Regressor'],
custom_name="Mock Regression Pipeline",
parameters={
"Imputer": {
"numeric_impute_strategy": "most_frequent"
},
"Random Forest Regressor": {
"n_estimators": 50
}
})
expected_code_params = "from evalml.pipelines.regression_pipeline import RegressionPipeline\n" \
"pipeline = RegressionPipeline(component_graph=['Imputer', 'Random Forest Regressor'], " \
"parameters={'Imputer':{'categorical_impute_strategy': 'most_frequent', 'numeric_impute_strategy': 'most_frequent', 'categorical_fill_value': None, 'numeric_fill_value': None}, " \
"'Random Forest Regressor':{'n_estimators': 50, 'max_depth': 6, 'n_jobs': -1}}, custom_name='Mock Regression Pipeline', random_seed=0)"
pipeline = generate_pipeline_code(regression_pipeline_with_params)
assert pipeline == expected_code_params
def test_submit_evaluate_job_single(self):
""" Test that evaluating a single pipeline using the parallel engine produces the
same results as simply running the evaluate_pipeline function. """
X, y = self.X_y_binary
X = ww.DataTable(X)
y = ww.DataColumn(y)
pipeline = BinaryClassificationPipeline(component_graph=["Logistic Regression Classifier"],
parameters={"Logistic Regression Classifier": {"n_jobs": 1}})
engine = DaskEngine(client=self.client)
# Verify that engine evaluates a pipeline
pipeline_future = engine.submit_evaluation_job(X=X, y=y,
automl_config=automl_data, pipeline=pipeline)
assert isinstance(pipeline_future, DaskComputation)
par_eval_results = pipeline_future.get_result()
original_eval_results = evaluate_pipeline(pipeline, automl_config=automl_data, X=X, y=y, logger=JobLogger())
# Ensure we get back the same output as the parallelized function.
assert len(par_eval_results) == 3
par_scores = par_eval_results.get("scores")
original_eval_scores = original_eval_results.get("scores")
# Compare cross validation information except training time.
assert par_scores["cv_data"] == original_eval_scores["cv_data"]
assert all(par_scores["cv_scores"] == original_eval_scores["cv_scores"])
assert par_scores["cv_score_mean"] == par_scores["cv_score_mean"]
# Make sure the resulting pipelines are the same.
assert isinstance(par_eval_results.get("pipeline"), PipelineBase)
assert par_eval_results.get("pipeline") == original_eval_results.get("pipeline")
# Make sure a properly filled logger comes back.
assert isinstance(par_eval_results.get("logger"), JobLogger)
assert par_eval_results.get("logger").logs == original_eval_results.get("logger").logs
def test_partial_dependence_datetime(problem_type, X_y_regression, X_y_binary, X_y_multi):
if problem_type == 'binary':
X, y = X_y_binary
pipeline = BinaryClassificationPipeline(component_graph=['Imputer', 'One Hot Encoder', 'DateTime Featurization Component', 'Standard Scaler', 'Logistic Regression Classifier'])
elif problem_type == 'multiclass':
X, y = X_y_multi
pipeline = MulticlassClassificationPipeline(component_graph=['Imputer', 'One Hot Encoder', 'DateTime Featurization Component', 'Standard Scaler', 'Logistic Regression Classifier'])
else:
X, y = X_y_regression
pipeline = RegressionPipeline(component_graph=['Imputer', 'One Hot Encoder', 'DateTime Featurization Component', 'Standard Scaler', 'Linear Regressor'])
X = pd.DataFrame(X, columns=[str(i) for i in range(X.shape[1])])
y = pd.Series(y)
X['dt_column'] = pd.Series(pd.date_range('20200101', periods=X.shape[0]))
pipeline.fit(X, y)
part_dep = partial_dependence(pipeline, X, features='dt_column')
if problem_type == 'multiclass':
assert len(part_dep["partial_dependence"]) == 300 # 100 rows * 3 classes
assert len(part_dep["feature_values"]) == 300
else:
assert len(part_dep["partial_dependence"]) == 100
assert len(part_dep["feature_values"]) == 100
assert not part_dep.isnull().any(axis=None)
part_dep = partial_dependence(pipeline, X, features=20)
if problem_type == 'multiclass':
assert len(part_dep["partial_dependence"]) == 300 # 100 rows * 3 classes
assert len(part_dep["feature_values"]) == 300
else:
assert len(part_dep["partial_dependence"]) == 100
assert len(part_dep["feature_values"]) == 100
assert not part_dep.isnull().any(axis=None)
with pytest.raises(ValueError, match='Two-way partial dependence is not supported for datetime columns.'):
part_dep = partial_dependence(pipeline, X, features=('0', 'dt_column'))
with pytest.raises(ValueError, match='Two-way partial dependence is not supported for datetime columns.'):
part_dep = partial_dependence(pipeline, X, features=(0, 20))
def test_iterative_algorithm_frozen_parameters():
class MockEstimator(Estimator):
name = "Mock Classifier"
model_family = ModelFamily.RANDOM_FOREST
supported_problem_types = [
ProblemTypes.BINARY, ProblemTypes.MULTICLASS
]
hyperparameter_ranges = {
'dummy_int_parameter': Integer(1, 10),
'dummy_categorical_parameter':
Categorical(["random", "dummy", "test"]),
'dummy_real_parameter': Real(0, 1)
}
def __init__(self,
dummy_int_parameter=0,
dummy_categorical_parameter='dummy',
dummy_real_parameter=1.0,
n_jobs=-1,
random_seed=0,
**kwargs):
super().__init__(parameters={
'dummy_int_parameter': dummy_int_parameter,
'dummy_categorical_parameter': dummy_categorical_parameter,
'dummy_real_parameter': dummy_real_parameter,
**kwargs, 'n_jobs': n_jobs
},
component_obj=None,
random_seed=random_seed)
pipeline = BinaryClassificationPipeline([MockEstimator])
algo = IterativeAlgorithm(allowed_pipelines=[pipeline, pipeline, pipeline],
pipeline_params={
'pipeline': {
'date_index': "Date",
"gap": 2,
"max_delay": 10
}
},
random_seed=0,
_frozen_pipeline_parameters={
"Mock Classifier": {
'dummy_int_parameter': 6,
'dummy_categorical_parameter': "random",
'dummy_real_parameter': 0.1
}
})
next_batch = algo.next_batch()
assert all([
p.parameters['pipeline'] == {
'date_index': "Date",
"gap": 2,
"max_delay": 10
} for p in next_batch
])
assert all([
p.parameters['Mock Classifier'] == {
'dummy_int_parameter': 6,
'dummy_categorical_parameter': "random",
'dummy_real_parameter': 0.1,
"n_jobs": -1
} for p in next_batch
])
scores = np.arange(0, len(next_batch))
for score, pipeline in zip(scores, next_batch):
algo.add_result(score, pipeline, {"id": algo.pipeline_number})
# make sure that future batches remain in the hyperparam range
for i in range(1, 5):
next_batch = algo.next_batch()
assert all([
p.parameters['Mock Classifier'] == {
'dummy_int_parameter': 6,
'dummy_categorical_parameter': "random",
'dummy_real_parameter': 0.1,
"n_jobs": -1
} for p in next_batch
])
def decision_tree_classification_pipeline_class(X_y_categorical_classification):
pipeline = BinaryClassificationPipeline(['Simple Imputer', 'One Hot Encoder', 'Standard Scaler', 'Decision Tree Classifier'])
X, y = X_y_categorical_classification
pipeline.fit(X, y)
return pipeline
def test_stacked_estimator_in_pipeline(
problem_type, X_y_binary, X_y_multi, X_y_regression,
stackable_classifiers, stackable_regressors,
logistic_regression_binary_pipeline_class,
logistic_regression_multiclass_pipeline_class,
linear_regression_pipeline_class):
if problem_type == ProblemTypes.BINARY:
X, y = X_y_binary
base_pipeline_class = BinaryClassificationPipeline
stacking_component_name = StackedEnsembleClassifier.name
input_pipelines = [
BinaryClassificationPipeline([classifier])
for classifier in stackable_classifiers
]
comparison_pipeline = logistic_regression_binary_pipeline_class(
parameters={"Logistic Regression Classifier": {
"n_jobs": 1
}})
objective = 'Log Loss Binary'
elif problem_type == ProblemTypes.MULTICLASS:
X, y = X_y_multi
base_pipeline_class = MulticlassClassificationPipeline
stacking_component_name = StackedEnsembleClassifier.name
input_pipelines = [
MulticlassClassificationPipeline([classifier])
for classifier in stackable_classifiers
]
comparison_pipeline = logistic_regression_multiclass_pipeline_class(
parameters={"Logistic Regression Classifier": {
"n_jobs": 1
}})
objective = 'Log Loss Multiclass'
elif problem_type == ProblemTypes.REGRESSION:
X, y = X_y_regression
base_pipeline_class = RegressionPipeline
stacking_component_name = StackedEnsembleRegressor.name
input_pipelines = [
RegressionPipeline([regressor])
for regressor in stackable_regressors
]
comparison_pipeline = linear_regression_pipeline_class(
parameters={"Linear Regressor": {
"n_jobs": 1
}})
objective = 'R2'
parameters = {
stacking_component_name: {
"input_pipelines": input_pipelines,
"n_jobs": 1
}
}
graph = ['Simple Imputer', stacking_component_name]
pipeline = base_pipeline_class(component_graph=graph,
parameters=parameters)
pipeline.fit(X, y)
comparison_pipeline.fit(X, y)
assert not np.isnan(pipeline.predict(X).to_series()).values.any()
pipeline_score = pipeline.score(X, y, [objective])[objective]
comparison_pipeline_score = comparison_pipeline.score(
X, y, [objective])[objective]
if problem_type == ProblemTypes.BINARY or problem_type == ProblemTypes.MULTICLASS:
assert not np.isnan(
pipeline.predict_proba(X).to_dataframe()).values.any()
assert (pipeline_score <= comparison_pipeline_score)
else:
assert (pipeline_score >= comparison_pipeline_score)
def test_binary_init():
clf = BinaryClassificationPipeline(component_graph=[
"Imputer", "One Hot Encoder", "Random Forest Classifier"
])
assert clf.parameters == {
'Imputer': {
'categorical_impute_strategy': 'most_frequent',
'numeric_impute_strategy': 'mean',
'categorical_fill_value': None,
'numeric_fill_value': None
},
'One Hot Encoder': {
'top_n': 10,
'features_to_encode': None,
'categories': None,
'drop': 'if_binary',
'handle_unknown': 'ignore',
'handle_missing': 'error'
},
'Random Forest Classifier': {
'n_estimators': 100,
'max_depth': 6,
'n_jobs': -1
}
}
assert clf.custom_hyperparameters is None
assert clf.name == "Random Forest Classifier w/ Imputer + One Hot Encoder"
assert clf.random_seed == 0
custom_hyperparameters = {
"Imputer": {
"numeric_impute_strategy": Categorical(["most_frequent", 'mean'])
},
"Imputer_1": {
"numeric_impute_strategy": Categorical(["median", 'mean'])
},
"Random Forest Classifier": {
"n_estimators": Categorical([50, 100])
}
}
parameters = {"One Hot Encoder": {"top_n": 20}}
clf = BinaryClassificationPipeline(
component_graph=[
"Imputer", "One Hot Encoder", "Random Forest Classifier"
],
parameters=parameters,
custom_hyperparameters=custom_hyperparameters,
custom_name="Custom Pipeline",
random_seed=42)
assert clf.parameters == {
'Imputer': {
'categorical_impute_strategy': 'most_frequent',
'numeric_impute_strategy': 'mean',
'categorical_fill_value': None,
'numeric_fill_value': None
},
'One Hot Encoder': {
'top_n': 20,
'features_to_encode': None,
'categories': None,
'drop': 'if_binary',
'handle_unknown': 'ignore',
'handle_missing': 'error'
},
'Random Forest Classifier': {
'n_estimators': 100,
'max_depth': 6,
'n_jobs': -1
}
}
assert clf.custom_hyperparameters == custom_hyperparameters
assert clf.name == "Custom Pipeline"
assert clf.random_seed == 42
def test_stacked_ensemble_nonstackable_model_families():
with pytest.raises(ValueError, match="Pipelines with any of the following model families cannot be used as base pipelines"):
StackedEnsembleClassifier(input_pipelines=[BinaryClassificationPipeline([BaselineClassifier])])
