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test_from_cudf.py
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test_from_cudf.py
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import numpy as np
import xgboost as xgb
import sys
import pytest
sys.path.append("tests/python")
import testing as tm
def dmatrix_from_cudf(input_type, DMatrixT, missing=np.NAN):
'''Test constructing DMatrix from cudf'''
import cudf
import pandas as pd
kRows = 80
kCols = 3
na = np.random.randn(kRows, kCols)
na[:, 0:2] = na[:, 0:2].astype(input_type)
na[5, 0] = missing
na[3, 1] = missing
pa = pd.DataFrame({'0': na[:, 0],
'1': na[:, 1],
'2': na[:, 2].astype(np.int32)})
np_label = np.random.randn(kRows).astype(input_type)
pa_label = pd.DataFrame(np_label)
cd = cudf.from_pandas(pa)
cd_label = cudf.from_pandas(pa_label).iloc[:, 0]
dtrain = DMatrixT(cd, missing=missing, label=cd_label)
assert dtrain.num_col() == kCols
assert dtrain.num_row() == kRows
def _test_from_cudf(DMatrixT):
'''Test constructing DMatrix from cudf'''
import cudf
dmatrix_from_cudf(np.float32, DMatrixT, np.NAN)
dmatrix_from_cudf(np.float64, DMatrixT, np.NAN)
dmatrix_from_cudf(np.int8, DMatrixT, 2)
dmatrix_from_cudf(np.int32, DMatrixT, -2)
dmatrix_from_cudf(np.int64, DMatrixT, -3)
cd = cudf.DataFrame({'x': [1, 2, 3], 'y': [0.1, 0.2, 0.3]})
dtrain = DMatrixT(cd)
assert dtrain.feature_names == ['x', 'y']
assert dtrain.feature_types == ['int', 'float']
series = cudf.DataFrame({'x': [1, 2, 3]}).iloc[:, 0]
assert isinstance(series, cudf.Series)
dtrain = DMatrixT(series)
assert dtrain.feature_names == ['x']
assert dtrain.feature_types == ['int']
with pytest.raises(Exception):
dtrain = DMatrixT(cd, label=cd)
# Test when number of elements is less than 8
X = cudf.DataFrame({'x': cudf.Series([0, 1, 2, np.NAN, 4],
dtype=np.int32)})
dtrain = DMatrixT(X)
assert dtrain.num_col() == 1
assert dtrain.num_row() == 5
# Boolean is not supported.
X_boolean = cudf.DataFrame({'x': cudf.Series([True, False])})
with pytest.raises(Exception):
dtrain = DMatrixT(X_boolean)
y_boolean = cudf.DataFrame({
'x': cudf.Series([True, False, True, True, True])})
with pytest.raises(Exception):
dtrain = DMatrixT(X_boolean, label=y_boolean)
def _test_cudf_training(DMatrixT):
from cudf import DataFrame as df
import pandas as pd
np.random.seed(1)
X = pd.DataFrame(np.random.randn(50, 10))
y = pd.DataFrame(np.random.randn(50))
weights = np.random.random(50) + 1.0
cudf_weights = df.from_pandas(pd.DataFrame(weights))
base_margin = np.random.random(50)
cudf_base_margin = df.from_pandas(pd.DataFrame(base_margin))
evals_result_cudf = {}
dtrain_cudf = DMatrixT(df.from_pandas(X), df.from_pandas(y), weight=cudf_weights,
base_margin=cudf_base_margin)
params = {'gpu_id': 0, 'tree_method': 'gpu_hist'}
xgb.train(params, dtrain_cudf, evals=[(dtrain_cudf, "train")],
evals_result=evals_result_cudf)
evals_result_np = {}
dtrain_np = xgb.DMatrix(X, y, weight=weights, base_margin=base_margin)
xgb.train(params, dtrain_np, evals=[(dtrain_np, "train")],
evals_result=evals_result_np)
assert np.array_equal(evals_result_cudf["train"]["rmse"], evals_result_np["train"]["rmse"])
def _test_cudf_metainfo(DMatrixT):
from cudf import DataFrame as df
import pandas as pd
n = 100
X = np.random.random((n, 2))
dmat_cudf = DMatrixT(df.from_pandas(pd.DataFrame(X)))
dmat = xgb.DMatrix(X)
floats = np.random.random(n)
uints = np.array([4, 2, 8]).astype("uint32")
cudf_floats = df.from_pandas(pd.DataFrame(floats))
cudf_uints = df.from_pandas(pd.DataFrame(uints))
dmat.set_float_info('weight', floats)
dmat.set_float_info('label', floats)
dmat.set_float_info('base_margin', floats)
dmat.set_uint_info('group', uints)
dmat_cudf.set_info(weight=cudf_floats)
dmat_cudf.set_info(label=cudf_floats)
dmat_cudf.set_info(base_margin=cudf_floats)
dmat_cudf.set_info(group=cudf_uints)
# Test setting info with cudf DataFrame
assert np.array_equal(dmat.get_float_info('weight'), dmat_cudf.get_float_info('weight'))
assert np.array_equal(dmat.get_float_info('label'), dmat_cudf.get_float_info('label'))
assert np.array_equal(dmat.get_float_info('base_margin'),
dmat_cudf.get_float_info('base_margin'))
assert np.array_equal(dmat.get_uint_info('group_ptr'), dmat_cudf.get_uint_info('group_ptr'))
# Test setting info with cudf Series
dmat_cudf.set_info(weight=cudf_floats[cudf_floats.columns[0]])
dmat_cudf.set_info(label=cudf_floats[cudf_floats.columns[0]])
dmat_cudf.set_info(base_margin=cudf_floats[cudf_floats.columns[0]])
dmat_cudf.set_info(group=cudf_uints[cudf_uints.columns[0]])
assert np.array_equal(dmat.get_float_info('weight'), dmat_cudf.get_float_info('weight'))
assert np.array_equal(dmat.get_float_info('label'), dmat_cudf.get_float_info('label'))
assert np.array_equal(dmat.get_float_info('base_margin'),
dmat_cudf.get_float_info('base_margin'))
assert np.array_equal(dmat.get_uint_info('group_ptr'), dmat_cudf.get_uint_info('group_ptr'))
class TestFromColumnar:
'''Tests for constructing DMatrix from data structure conforming Apache
Arrow specification.'''
@pytest.mark.skipif(**tm.no_cudf())
def test_simple_dmatrix_from_cudf(self):
_test_from_cudf(xgb.DMatrix)
@pytest.mark.skipif(**tm.no_cudf())
def test_device_dmatrix_from_cudf(self):
_test_from_cudf(xgb.DeviceQuantileDMatrix)
@pytest.mark.skipif(**tm.no_cudf())
def test_cudf_training_simple_dmatrix(self):
_test_cudf_training(xgb.DMatrix)
@pytest.mark.skipif(**tm.no_cudf())
def test_cudf_training_device_dmatrix(self):
_test_cudf_training(xgb.DeviceQuantileDMatrix)
@pytest.mark.skipif(**tm.no_cudf())
def test_cudf_metainfo_simple_dmatrix(self):
_test_cudf_metainfo(xgb.DMatrix)
@pytest.mark.skipif(**tm.no_cudf())
def test_cudf_metainfo_device_dmatrix(self):
_test_cudf_metainfo(xgb.DeviceQuantileDMatrix)
@pytest.mark.skipif(**tm.no_cudf())
def test_categorical(self):
import cudf
_X, _y = tm.make_categorical(100, 30, 17, False)
X = cudf.from_pandas(_X)
y = cudf.from_pandas(_y)
Xy = xgb.DMatrix(X, y, enable_categorical=True)
assert len(Xy.feature_types) == X.shape[1]
assert all(t == "categorical" for t in Xy.feature_types)
Xy = xgb.DeviceQuantileDMatrix(X, y, enable_categorical=True)
assert len(Xy.feature_types) == X.shape[1]
assert all(t == "categorical" for t in Xy.feature_types)
@pytest.mark.skipif(**tm.no_cudf())
@pytest.mark.skipif(**tm.no_cupy())
@pytest.mark.skipif(**tm.no_sklearn())
@pytest.mark.skipif(**tm.no_pandas())
def test_cudf_training_with_sklearn():
from cudf import DataFrame as df
from cudf import Series as ss
import pandas as pd
np.random.seed(1)
X = pd.DataFrame(np.random.randn(50, 10))
y = pd.DataFrame((np.random.randn(50) > 0).astype(np.int8))
weights = np.random.random(50) + 1.0
cudf_weights = df.from_pandas(pd.DataFrame(weights))
base_margin = np.random.random(50)
cudf_base_margin = df.from_pandas(pd.DataFrame(base_margin))
X_cudf = df.from_pandas(X)
y_cudf = df.from_pandas(y)
y_cudf_series = ss(data=y.iloc[:, 0])
for y_obj in [y_cudf, y_cudf_series]:
clf = xgb.XGBClassifier(gpu_id=0, tree_method='gpu_hist', use_label_encoder=False)
clf.fit(X_cudf, y_obj, sample_weight=cudf_weights, base_margin=cudf_base_margin,
eval_set=[(X_cudf, y_obj)])
pred = clf.predict(X_cudf)
assert np.array_equal(np.unique(pred), np.array([0, 1]))
class IterForDMatrixTest(xgb.core.DataIter):
'''A data iterator for XGBoost DMatrix.
`reset` and `next` are required for any data iterator, other functions here
are utilites for demonstration's purpose.
'''
ROWS_PER_BATCH = 100 # data is splited by rows
BATCHES = 16
def __init__(self, categorical):
'''Generate some random data for demostration.
Actual data can be anything that is currently supported by XGBoost.
'''
import cudf
self.rows = self.ROWS_PER_BATCH
if categorical:
self._data = []
self._labels = []
for i in range(self.BATCHES):
X, y = tm.make_categorical(self.ROWS_PER_BATCH, 4, 13, False)
self._data.append(cudf.from_pandas(X))
self._labels.append(y)
else:
rng = np.random.RandomState(1994)
self._data = [
cudf.DataFrame(
{'a': rng.randn(self.ROWS_PER_BATCH),
'b': rng.randn(self.ROWS_PER_BATCH)})] * self.BATCHES
self._labels = [rng.randn(self.rows)] * self.BATCHES
self.it = 0 # set iterator to 0
super().__init__()
def as_array(self):
import cudf
return cudf.concat(self._data)
def as_array_labels(self):
return np.concatenate(self._labels)
def data(self):
'''Utility function for obtaining current batch of data.'''
return self._data[self.it]
def labels(self):
'''Utility function for obtaining current batch of label.'''
return self._labels[self.it]
def reset(self):
'''Reset the iterator'''
self.it = 0
def next(self, input_data):
'''Yield next batch of data'''
if self.it == len(self._data):
# Return 0 when there's no more batch.
return 0
input_data(data=self.data(), label=self.labels())
self.it += 1
return 1
@pytest.mark.skipif(**tm.no_cudf())
@pytest.mark.parametrize("enable_categorical", [True, False])
def test_from_cudf_iter(enable_categorical):
rounds = 100
it = IterForDMatrixTest(enable_categorical)
params = {"tree_method": "gpu_hist"}
# Use iterator
m_it = xgb.DeviceQuantileDMatrix(it, enable_categorical=enable_categorical)
reg_with_it = xgb.train(params, m_it, num_boost_round=rounds)
X = it.as_array()
y = it.as_array_labels()
m = xgb.DMatrix(X, y, enable_categorical=enable_categorical)
assert m_it.num_col() == m.num_col()
assert m_it.num_row() == m.num_row()
reg = xgb.train(params, m, num_boost_round=rounds)
predict = reg.predict(m)
predict_with_it = reg_with_it.predict(m_it)
np.testing.assert_allclose(predict_with_it, predict)