def test_local_classifier_from_to_parquet(setup):
n_rows = 1000
n_columns = 10
rs = np.random.RandomState(0)
X = rs.rand(n_rows, n_columns)
y = (rs.rand(n_rows) > 0.5).astype(np.int32)
df = pd.DataFrame(X, columns=[f'c{i}' for i in range(n_columns)])
# test with existing model
classifier = lightgbm.LGBMClassifier(n_estimators=2)
classifier.fit(X, y, verbose=True)
with tempfile.TemporaryDirectory() as d:
result_dir = os.path.join(d, 'result')
os.mkdir(result_dir)
data_dir = os.path.join(d, 'data')
os.mkdir(data_dir)
df.iloc[:500].to_parquet(os.path.join(d, 'data', 'data1.parquet'))
df.iloc[500:].to_parquet(os.path.join(d, 'data', 'data2.parquet'))
df = md.read_parquet(data_dir)
model = LGBMClassifier()
model.load_model(classifier)
result = model.predict(df, run=False)
r = md.DataFrame(result).to_parquet(result_dir)
r.execute()
ret = md.read_parquet(result_dir).to_pandas().iloc[:, 0].to_numpy()
expected = classifier.predict(X)
expected = np.stack([1 - expected, expected]).argmax(axis=0)
np.testing.assert_array_equal(ret, expected)
def testDistributedLGBMClassifier(self):
service_ep = 'http://127.0.0.1:' + self.web_port
timeout = 120 if 'CI' in os.environ else -1
with new_session(service_ep) as sess:
run_kwargs = {'timeout': timeout}
X, y = self.X, self.y
y = (y * 10).astype(mt.int32)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, y, session=sess, run_kwargs=run_kwargs)
prediction = classifier.predict(X, session=sess, run_kwargs=run_kwargs)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
self.assertIsInstance(prediction, mt.Tensor)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, y, eval_set=[(X, y)], session=sess, run_kwargs=run_kwargs)
prediction = classifier.predict(X, session=sess, run_kwargs=run_kwargs)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
self.assertIsInstance(prediction, mt.Tensor)
def func():
import lightgbm
import xgboost
import mars.tensor as mt
from mars.learn.contrib.lightgbm import LGBMClassifier
n_rows = 1000
n_columns = 10
chunk_size = 50
rs = mt.random.RandomState(0)
X = rs.rand(n_rows, n_columns, chunk_size=chunk_size)
y = rs.rand(n_rows, chunk_size=chunk_size)
y = (y * 10).astype(mt.int32)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, y, eval_set=[(X, y)])
prediction = classifier.predict(X)
def testLocalClassifierFromToParquet(self):
n_rows = 1000
n_columns = 10
rs = np.random.RandomState(0)
X = rs.rand(n_rows, n_columns)
y = (rs.rand(n_rows) > 0.5).astype(np.int32)
df = pd.DataFrame(X, columns=[f'c{i}' for i in range(n_columns)])
# test with existing model
classifier = lightgbm.LGBMClassifier(n_estimators=2)
classifier.fit(X, y, verbose=True)
with tempfile.TemporaryDirectory() as d:
result_dir = os.path.join(d, 'result')
os.mkdir(result_dir)
data_dir = os.path.join(d, 'data')
os.mkdir(data_dir)
df.iloc[:500].to_parquet(os.path.join(d, 'data', 'data1.parquet'))
df.iloc[500:].to_parquet(os.path.join(d, 'data', 'data2.parquet'))
df = md.read_parquet(data_dir)
model = LGBMClassifier()
model.load_model(classifier)
result = model.predict(df, run=False)
r = md.DataFrame(result).to_parquet(result_dir)
# tiles to ensure no iterative tiling exists
g = r.build_graph(tiled=True)
self.assertTrue(all(isinstance(n.op, Fuse) for n in g))
self.assertEqual(len(g), 2)
r.execute()
ret = md.read_parquet(result_dir).to_pandas().iloc[:, 0].to_numpy()
expected = classifier.predict(X)
expected = np.stack([1 - expected, expected]).argmax(axis=0)
np.testing.assert_array_equal(ret, expected)
def testLocalClassifier(self):
X, y = self.X, self.y
y = (y * 10).astype(mt.int32)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, y, eval_set=[(X, y)], verbose=True)
prediction = classifier.predict(X)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
self.assertIsInstance(prediction, mt.Tensor)
# test sparse tensor
X_sparse = self.X_sparse
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X_sparse, y, eval_set=[(X_sparse, y)], verbose=True)
prediction = classifier.predict(X_sparse)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
self.assertIsInstance(prediction, mt.Tensor)
prob = classifier.predict_proba(X)
self.assertEqual(prob.shape, X.shape)
prediction_empty = classifier.predict(
mt.array([]).reshape((0, X.shape[1])))
self.assertEqual(prediction_empty.shape, (0, ))
# test dataframe
X_df = self.X_df
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X_df, y, verbose=True)
prediction = classifier.predict(X_df)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
prob = classifier.predict_proba(X_df)
self.assertEqual(prob.ndim, 2)
self.assertEqual(prob.shape, (len(self.X), 10))
# test weight
weights = [
mt.random.rand(X.shape[0]),
md.Series(mt.random.rand(X.shape[0]))
]
y_df = md.DataFrame(y)
for weight in weights:
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, y_df, sample_weight=weight, verbose=True)
prediction = classifier.predict(X)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
# should raise error if weight.ndim > 1
with self.assertRaises(ValueError):
LGBMClassifier(n_estimators=2).fit(X,
y_df,
sample_weight=mt.random.rand(
1, 1),
verbose=True)
# test binary classifier
new_y = (self.y > 0.5).astype(mt.int32)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, new_y, verbose=True)
prediction = classifier.predict(X)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
prediction = classifier.predict_proba(X)
self.assertEqual(prediction.ndim, 2)
self.assertEqual(prediction.shape[0], len(self.X))
# test with existing model
classifier = lightgbm.LGBMClassifier(n_estimators=2)
classifier.fit(X, new_y, verbose=True)
label_result = predict(classifier, X_df)
self.assertEqual(label_result.ndim, 1)
self.assertEqual(label_result.shape[0], len(self.X))
proba_result = predict_proba(classifier, X_df)
self.assertEqual(proba_result.ndim, 2)
self.assertEqual(proba_result.shape[0], len(self.X))
def testDistributedLGBMClassifier(self):
service_ep = 'http://127.0.0.1:' + self.web_port
timeout = 120 if 'CI' in os.environ else -1
with new_session(service_ep) as sess:
run_kwargs = {'timeout': timeout}
X, y = self.X, self.y
y = (y * 10).astype(mt.int32)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, y, session=sess, run_kwargs=run_kwargs)
prediction = classifier.predict(X,
session=sess,
run_kwargs=run_kwargs)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
# fi on fitted model shall work well
classifier.fit(X, y, session=sess, run_kwargs=run_kwargs)
prediction = classifier.predict(X,
session=sess,
run_kwargs=run_kwargs)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
self.assertIsInstance(prediction, mt.Tensor)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X,
y,
eval_set=[(X, y)],
session=sess,
run_kwargs=run_kwargs)
prediction = classifier.predict(X,
session=sess,
run_kwargs=run_kwargs)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(self.X))
self.assertIsInstance(prediction, mt.Tensor)
X = md.DataFrame(np.random.rand(100, 20), chunk_size=20)
y = md.DataFrame(np.random.randint(0, 2, (100, 1)), chunk_size=20)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, y, session=sess, run_kwargs=run_kwargs)
prediction = classifier.predict(X,
session=sess,
run_kwargs=run_kwargs)
self.assertEqual(prediction.ndim, 1)
self.assertEqual(prediction.shape[0], len(X))
self.assertIsInstance(prediction, md.Series)
def test_local_classifier(setup):
y_data = (y * 10).astype(mt.int32)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, y_data, eval_set=[(X, y_data)], verbose=True)
prediction = classifier.predict(X)
assert prediction.ndim == 1
assert prediction.shape[0] == len(X)
assert isinstance(prediction, mt.Tensor)
# test sparse tensor
X_sparse_data = X_sparse
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X_sparse_data, y_data,
eval_set=[(X_sparse_data, y_data)], verbose=True)
prediction = classifier.predict(X_sparse_data)
assert prediction.ndim == 1
assert prediction.shape[0] == len(X)
assert isinstance(prediction, mt.Tensor)
prob = classifier.predict_proba(X)
assert prob.shape == X.shape
prediction_empty = classifier.predict(mt.array([]).reshape((0, X.shape[1])))
assert prediction_empty.shape == (0,)
# test dataframe
X_df_data = X_df
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X_df_data, y_data, verbose=True)
prediction = classifier.predict(X_df_data)
assert prediction.ndim == 1
assert prediction.shape[0] == len(X)
prob = classifier.predict_proba(X_df)
assert prob.ndim == 2
assert prob.shape == (len(X), 10)
# test weight
weights = [mt.random.rand(X.shape[0]), md.Series(mt.random.rand(X.shape[0]))]
y_df = md.DataFrame(y_data)
for weight in weights:
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, y_df, sample_weight=weight, verbose=True)
prediction = classifier.predict(X)
assert prediction.ndim == 1
assert prediction.shape[0] == len(X)
# should raise error if weight.ndim > 1
with pytest.raises(ValueError):
LGBMClassifier(n_estimators=2).fit(
X, y_df, sample_weight=mt.random.rand(1, 1), verbose=True)
# test binary classifier
new_y = (y_data > 0.5).astype(mt.int32)
classifier = LGBMClassifier(n_estimators=2)
classifier.fit(X, new_y, verbose=True)
prediction = classifier.predict(X)
assert prediction.ndim == 1
assert prediction.shape[0] == len(X)
prediction = classifier.predict_proba(X)
assert prediction.ndim == 2
assert prediction.shape[0] == len(X)
# test with existing model
X_np = X.execute().fetch()
new_y_np = new_y.execute().fetch()
raw_classifier = lightgbm.LGBMClassifier(n_estimators=2)
raw_classifier.fit(X_np, new_y_np, verbose=True)
classifier = LGBMClassifier(raw_classifier)
label_result = classifier.predict(X_df)
assert label_result.ndim == 1
assert label_result.shape[0] == len(X)
proba_result = classifier.predict_proba(X_df)
assert proba_result.ndim == 2
assert proba_result.shape[0] == len(X)
