18d2ba53e4
### What changes were proposed in this pull request? Add ANOVASelector and FValueSelector to PySpark ### Why are the changes needed? ANOVASelector and FValueSelector have been implemented in Scala. We need to implement these in Python as well. ### Does this PR introduce _any_ user-facing change? Yes. Add Python version of ANOVASelector and FValueSelector ### How was this patch tested? new doctest Closes #28464 from huaxingao/selector_py. Authored-by: Huaxin Gao <huaxing@us.ibm.com> Signed-off-by: zhengruifeng <ruifengz@foxmail.com>
392 lines
16 KiB
Python
392 lines
16 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import inspect
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import sys
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import array as pyarray
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import unittest
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import numpy as np
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from pyspark import keyword_only
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from pyspark.ml.classification import LogisticRegression
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from pyspark.ml.clustering import KMeans
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from pyspark.ml.feature import Binarizer, Bucketizer, ElementwiseProduct, IndexToString, \
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MaxAbsScaler, VectorSlicer, Word2Vec
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from pyspark.ml.linalg import DenseVector, SparseVector, Vectors
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from pyspark.ml.param import Param, Params, TypeConverters
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from pyspark.ml.param.shared import HasInputCol, HasMaxIter, HasSeed
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from pyspark.ml.wrapper import JavaParams
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from pyspark.testing.mlutils import check_params, PySparkTestCase, SparkSessionTestCase
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if sys.version > '3':
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xrange = range
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class ParamTypeConversionTests(PySparkTestCase):
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"""
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Test that param type conversion happens.
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"""
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def test_int(self):
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lr = LogisticRegression(maxIter=5.0)
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self.assertEqual(lr.getMaxIter(), 5)
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self.assertTrue(type(lr.getMaxIter()) == int)
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self.assertRaises(TypeError, lambda: LogisticRegression(maxIter="notAnInt"))
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self.assertRaises(TypeError, lambda: LogisticRegression(maxIter=5.1))
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def test_float(self):
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lr = LogisticRegression(tol=1)
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self.assertEqual(lr.getTol(), 1.0)
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self.assertTrue(type(lr.getTol()) == float)
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self.assertRaises(TypeError, lambda: LogisticRegression(tol="notAFloat"))
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def test_vector(self):
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ewp = ElementwiseProduct(scalingVec=[1, 3])
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self.assertEqual(ewp.getScalingVec(), DenseVector([1.0, 3.0]))
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ewp = ElementwiseProduct(scalingVec=np.array([1.2, 3.4]))
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self.assertEqual(ewp.getScalingVec(), DenseVector([1.2, 3.4]))
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self.assertRaises(TypeError, lambda: ElementwiseProduct(scalingVec=["a", "b"]))
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def test_list(self):
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l = [0, 1]
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for lst_like in [l, np.array(l), DenseVector(l), SparseVector(len(l), range(len(l)), l),
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pyarray.array('l', l), xrange(2), tuple(l)]:
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converted = TypeConverters.toList(lst_like)
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self.assertEqual(type(converted), list)
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self.assertListEqual(converted, l)
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def test_list_int(self):
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for indices in [[1.0, 2.0], np.array([1.0, 2.0]), DenseVector([1.0, 2.0]),
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SparseVector(2, {0: 1.0, 1: 2.0}), xrange(1, 3), (1.0, 2.0),
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pyarray.array('d', [1.0, 2.0])]:
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vs = VectorSlicer(indices=indices)
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self.assertListEqual(vs.getIndices(), [1, 2])
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self.assertTrue(all([type(v) == int for v in vs.getIndices()]))
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self.assertRaises(TypeError, lambda: VectorSlicer(indices=["a", "b"]))
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def test_list_float(self):
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b = Bucketizer(splits=[1, 4])
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self.assertEqual(b.getSplits(), [1.0, 4.0])
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self.assertTrue(all([type(v) == float for v in b.getSplits()]))
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self.assertRaises(TypeError, lambda: Bucketizer(splits=["a", 1.0]))
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def test_list_list_float(self):
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b = Bucketizer(splitsArray=[[-0.1, 0.5, 3], [-5, 1.5]])
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self.assertEqual(b.getSplitsArray(), [[-0.1, 0.5, 3.0], [-5.0, 1.5]])
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self.assertTrue(all([type(v) == list for v in b.getSplitsArray()]))
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self.assertTrue(all([type(v) == float for v in b.getSplitsArray()[0]]))
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self.assertTrue(all([type(v) == float for v in b.getSplitsArray()[1]]))
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self.assertRaises(TypeError, lambda: Bucketizer(splitsArray=["a", 1.0]))
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self.assertRaises(TypeError, lambda: Bucketizer(splitsArray=[[-5, 1.5], ["a", 1.0]]))
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def test_list_string(self):
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for labels in [np.array(['a', u'b']), ['a', u'b'], np.array(['a', 'b'])]:
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idx_to_string = IndexToString(labels=labels)
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self.assertListEqual(idx_to_string.getLabels(), ['a', 'b'])
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self.assertRaises(TypeError, lambda: IndexToString(labels=['a', 2]))
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def test_string(self):
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lr = LogisticRegression()
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for col in ['features', u'features', np.str_('features')]:
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lr.setFeaturesCol(col)
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self.assertEqual(lr.getFeaturesCol(), 'features')
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self.assertRaises(TypeError, lambda: LogisticRegression(featuresCol=2.3))
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def test_bool(self):
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self.assertRaises(TypeError, lambda: LogisticRegression(fitIntercept=1))
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self.assertRaises(TypeError, lambda: LogisticRegression(fitIntercept="false"))
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class TestParams(HasMaxIter, HasInputCol, HasSeed):
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"""
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A subclass of Params mixed with HasMaxIter, HasInputCol and HasSeed.
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"""
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@keyword_only
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def __init__(self, seed=None):
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super(TestParams, self).__init__()
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self._setDefault(maxIter=10)
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kwargs = self._input_kwargs
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self.setParams(**kwargs)
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@keyword_only
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def setParams(self, seed=None):
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"""
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setParams(self, seed=None)
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Sets params for this test.
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"""
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kwargs = self._input_kwargs
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return self._set(**kwargs)
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class OtherTestParams(HasMaxIter, HasInputCol, HasSeed):
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"""
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A subclass of Params mixed with HasMaxIter, HasInputCol and HasSeed.
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"""
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@keyword_only
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def __init__(self, seed=None):
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super(OtherTestParams, self).__init__()
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self._setDefault(maxIter=10)
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kwargs = self._input_kwargs
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self.setParams(**kwargs)
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@keyword_only
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def setParams(self, seed=None):
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"""
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setParams(self, seed=None)
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Sets params for this test.
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"""
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kwargs = self._input_kwargs
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return self._set(**kwargs)
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class HasThrowableProperty(Params):
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def __init__(self):
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super(HasThrowableProperty, self).__init__()
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self.p = Param(self, "none", "empty param")
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@property
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def test_property(self):
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raise RuntimeError("Test property to raise error when invoked")
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class ParamTests(SparkSessionTestCase):
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def test_copy_new_parent(self):
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testParams = TestParams()
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# Copying an instantiated param should fail
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with self.assertRaises(ValueError):
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testParams.maxIter._copy_new_parent(testParams)
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# Copying a dummy param should succeed
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TestParams.maxIter._copy_new_parent(testParams)
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maxIter = testParams.maxIter
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self.assertEqual(maxIter.name, "maxIter")
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self.assertEqual(maxIter.doc, "max number of iterations (>= 0).")
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self.assertTrue(maxIter.parent == testParams.uid)
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def test_param(self):
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testParams = TestParams()
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maxIter = testParams.maxIter
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self.assertEqual(maxIter.name, "maxIter")
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self.assertEqual(maxIter.doc, "max number of iterations (>= 0).")
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self.assertTrue(maxIter.parent == testParams.uid)
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def test_hasparam(self):
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testParams = TestParams()
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self.assertTrue(all([testParams.hasParam(p.name) for p in testParams.params]))
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self.assertFalse(testParams.hasParam("notAParameter"))
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self.assertTrue(testParams.hasParam(u"maxIter"))
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def test_resolveparam(self):
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testParams = TestParams()
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self.assertEqual(testParams._resolveParam(testParams.maxIter), testParams.maxIter)
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self.assertEqual(testParams._resolveParam("maxIter"), testParams.maxIter)
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self.assertEqual(testParams._resolveParam(u"maxIter"), testParams.maxIter)
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if sys.version_info[0] >= 3:
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# In Python 3, it is allowed to get/set attributes with non-ascii characters.
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e_cls = AttributeError
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else:
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e_cls = UnicodeEncodeError
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self.assertRaises(e_cls, lambda: testParams._resolveParam(u"아"))
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def test_params(self):
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testParams = TestParams()
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maxIter = testParams.maxIter
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inputCol = testParams.inputCol
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seed = testParams.seed
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params = testParams.params
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self.assertEqual(params, [inputCol, maxIter, seed])
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self.assertTrue(testParams.hasParam(maxIter.name))
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self.assertTrue(testParams.hasDefault(maxIter))
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self.assertFalse(testParams.isSet(maxIter))
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self.assertTrue(testParams.isDefined(maxIter))
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self.assertEqual(testParams.getMaxIter(), 10)
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self.assertTrue(testParams.hasParam(inputCol.name))
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self.assertFalse(testParams.hasDefault(inputCol))
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self.assertFalse(testParams.isSet(inputCol))
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self.assertFalse(testParams.isDefined(inputCol))
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with self.assertRaises(KeyError):
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testParams.getInputCol()
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otherParam = Param(Params._dummy(), "otherParam", "Parameter used to test that " +
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"set raises an error for a non-member parameter.",
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typeConverter=TypeConverters.toString)
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with self.assertRaises(ValueError):
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testParams.set(otherParam, "value")
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# Since the default is normally random, set it to a known number for debug str
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testParams._setDefault(seed=41)
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self.assertEqual(
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testParams.explainParams(),
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"\n".join(["inputCol: input column name. (undefined)",
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"maxIter: max number of iterations (>= 0). (default: 10)",
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"seed: random seed. (default: 41)"]))
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def test_clear_param(self):
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df = self.spark.createDataFrame([(Vectors.dense([1.0]),), (Vectors.dense([2.0]),)], ["a"])
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maScaler = MaxAbsScaler(inputCol="a", outputCol="scaled")
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model = maScaler.fit(df)
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self.assertTrue(model.isSet(model.outputCol))
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self.assertEqual(model.getOutputCol(), "scaled")
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model.clear(model.outputCol)
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self.assertFalse(model.isSet(model.outputCol))
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self.assertEqual(model.getOutputCol()[:12], 'MaxAbsScaler')
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output = model.transform(df)
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self.assertEqual(model.getOutputCol(), output.schema.names[1])
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def test_kmeans_param(self):
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algo = KMeans()
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self.assertEqual(algo.getInitMode(), "k-means||")
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algo.setK(10)
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self.assertEqual(algo.getK(), 10)
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algo.setInitSteps(10)
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self.assertEqual(algo.getInitSteps(), 10)
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self.assertEqual(algo.getDistanceMeasure(), "euclidean")
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algo.setDistanceMeasure("cosine")
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self.assertEqual(algo.getDistanceMeasure(), "cosine")
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def test_hasseed(self):
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noSeedSpecd = TestParams()
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withSeedSpecd = TestParams(seed=42)
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other = OtherTestParams()
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# Check that we no longer use 42 as the magic number
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self.assertNotEqual(noSeedSpecd.getSeed(), 42)
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origSeed = noSeedSpecd.getSeed()
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# Check that we only compute the seed once
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self.assertEqual(noSeedSpecd.getSeed(), origSeed)
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# Check that a specified seed is honored
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self.assertEqual(withSeedSpecd.getSeed(), 42)
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# Check that a different class has a different seed
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self.assertNotEqual(other.getSeed(), noSeedSpecd.getSeed())
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def test_param_property_error(self):
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param_store = HasThrowableProperty()
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self.assertRaises(RuntimeError, lambda: param_store.test_property)
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params = param_store.params # should not invoke the property 'test_property'
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self.assertEqual(len(params), 1)
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def test_word2vec_param(self):
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model = Word2Vec().setWindowSize(6)
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# Check windowSize is set properly
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self.assertEqual(model.getWindowSize(), 6)
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def test_copy_param_extras(self):
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tp = TestParams(seed=42)
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extra = {tp.getParam(TestParams.inputCol.name): "copy_input"}
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tp_copy = tp.copy(extra=extra)
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self.assertEqual(tp.uid, tp_copy.uid)
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self.assertEqual(tp.params, tp_copy.params)
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for k, v in extra.items():
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self.assertTrue(tp_copy.isDefined(k))
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self.assertEqual(tp_copy.getOrDefault(k), v)
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copied_no_extra = {}
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for k, v in tp_copy._paramMap.items():
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if k not in extra:
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copied_no_extra[k] = v
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self.assertEqual(tp._paramMap, copied_no_extra)
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self.assertEqual(tp._defaultParamMap, tp_copy._defaultParamMap)
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with self.assertRaises(TypeError):
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tp.copy(extra={"unknown_parameter": None})
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with self.assertRaises(TypeError):
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tp.copy(extra=["must be a dict"])
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def test_logistic_regression_check_thresholds(self):
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self.assertIsInstance(
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LogisticRegression(threshold=0.5, thresholds=[0.5, 0.5]),
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LogisticRegression
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)
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self.assertRaisesRegexp(
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ValueError,
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"Logistic Regression getThreshold found inconsistent.*$",
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LogisticRegression, threshold=0.42, thresholds=[0.5, 0.5]
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)
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def test_preserve_set_state(self):
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dataset = self.spark.createDataFrame([(0.5,)], ["data"])
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binarizer = Binarizer(inputCol="data")
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self.assertFalse(binarizer.isSet("threshold"))
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binarizer.transform(dataset)
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binarizer._transfer_params_from_java()
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self.assertFalse(binarizer.isSet("threshold"),
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"Params not explicitly set should remain unset after transform")
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def test_default_params_transferred(self):
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dataset = self.spark.createDataFrame([(0.5,)], ["data"])
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binarizer = Binarizer(inputCol="data")
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# intentionally change the pyspark default, but don't set it
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binarizer._defaultParamMap[binarizer.outputCol] = "my_default"
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result = binarizer.transform(dataset).select("my_default").collect()
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self.assertFalse(binarizer.isSet(binarizer.outputCol))
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self.assertEqual(result[0][0], 1.0)
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class DefaultValuesTests(PySparkTestCase):
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"""
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Test :py:class:`JavaParams` classes to see if their default Param values match
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those in their Scala counterparts.
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"""
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def test_java_params(self):
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import re
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import pyspark.ml.feature
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import pyspark.ml.classification
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import pyspark.ml.clustering
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import pyspark.ml.evaluation
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import pyspark.ml.pipeline
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import pyspark.ml.recommendation
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import pyspark.ml.regression
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modules = [pyspark.ml.feature, pyspark.ml.classification, pyspark.ml.clustering,
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pyspark.ml.evaluation, pyspark.ml.pipeline, pyspark.ml.recommendation,
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pyspark.ml.regression]
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for module in modules:
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for name, cls in inspect.getmembers(module, inspect.isclass):
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if not name.endswith('Model') and not name.endswith('Params') \
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and issubclass(cls, JavaParams) and not inspect.isabstract(cls) \
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and not re.match("_?Java", name) and name != '_LSH' \
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and name != '_Selector':
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# NOTE: disable check_params_exist until there is parity with Scala API
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check_params(self, cls(), check_params_exist=False)
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# Additional classes that need explicit construction
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from pyspark.ml.feature import CountVectorizerModel, StringIndexerModel
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check_params(self, CountVectorizerModel.from_vocabulary(['a'], 'input'),
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check_params_exist=False)
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check_params(self, StringIndexerModel.from_labels(['a', 'b'], 'input'),
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check_params_exist=False)
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if __name__ == "__main__":
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from pyspark.ml.tests.test_param import *
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try:
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import xmlrunner
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testRunner = xmlrunner.XMLTestRunner(output='target/test-reports', verbosity=2)
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except ImportError:
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testRunner = None
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unittest.main(testRunner=testRunner, verbosity=2)
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