096cb127ac
Author: Holden Karau <holden@pigscanfly.ca>
Closes #6139 from holdenk/SPARK-7511-pyspark-ml-seed-param-should-be-random-by-default-or-42-is-quite-funny-but-not-very-random and squashes the following commits:
591f8e5 [Holden Karau] specify old seed for doc tests
2470004 [Holden Karau] Fix a bunch of seeds with default values to have None as the default which will then result in using the hash of the class name
cbad96d [Holden Karau] Add the setParams function that is used in the real code
423b8d7 [Holden Karau] Switch the test code to behave slightly more like production code. also don't check the param map value only check for key existence
140d25d [Holden Karau] remove extra space
926165a [Holden Karau] Add some missing newlines for pep8 style
8616751 [Holden Karau] merge in master
58532e6 [Holden Karau] its the __name__ method, also treat None values as not set
56ef24a [Holden Karau] fix test and regenerate base
afdaa5c [Holden Karau] make sure different classes have different results
68eb528 [Holden Karau] switch default seed to hash of type of self
89c4611 [Holden Karau] Merge branch 'master' into SPARK-7511-pyspark-ml-seed-param-should-be-random-by-default-or-42-is-quite-funny-but-not-very-random
31cd96f [Holden Karau] specify the seed to randomforestregressor test
e1b947f [Holden Karau] Style fixes
ce90ec8 [Holden Karau] merge in master
bcdf3c9 [Holden Karau] update docstring seeds to none and some other default seeds from 42
65eba21 [Holden Karau] pep8 fixes
0e3797e [Holden Karau] Make seed default to random in more places
213a543 [Holden Karau] Simplify the generated code to only include set default if there is a default rather than having None is note None in the generated code
1ff17c2 [Holden Karau] Make the seed random for HasSeed in python
(cherry picked from commit 191ee47452
)
Signed-off-by: Joseph K. Bradley <joseph@databricks.com>
169 lines
7 KiB
Python
169 lines
7 KiB
Python
#
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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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from __future__ import print_function
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header = """#
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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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# Code generator for shared params (shared.py). Run under this folder with:
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# python _shared_params_code_gen.py > shared.py
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def _gen_param_header(name, doc, defaultValueStr):
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"""
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Generates the header part for shared variables
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:param name: param name
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:param doc: param doc
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"""
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template = '''class Has$Name(Params):
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"""
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Mixin for param $name: $doc.
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"""
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# a placeholder to make it appear in the generated doc
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$name = Param(Params._dummy(), "$name", "$doc")
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def __init__(self):
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super(Has$Name, self).__init__()
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#: param for $doc
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self.$name = Param(self, "$name", "$doc")'''
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if defaultValueStr is not None:
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template += '''
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self._setDefault($name=$defaultValueStr)'''
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Name = name[0].upper() + name[1:]
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return template \
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.replace("$name", name) \
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.replace("$Name", Name) \
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.replace("$doc", doc) \
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.replace("$defaultValueStr", str(defaultValueStr))
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def _gen_param_code(name, doc, defaultValueStr):
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"""
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Generates Python code for a shared param class.
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:param name: param name
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:param doc: param doc
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:param defaultValueStr: string representation of the default value
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:return: code string
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"""
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# TODO: How to correctly inherit instance attributes?
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template = '''
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def set$Name(self, value):
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"""
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Sets the value of :py:attr:`$name`.
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"""
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self._paramMap[self.$name] = value
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return self
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def get$Name(self):
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"""
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Gets the value of $name or its default value.
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"""
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return self.getOrDefault(self.$name)'''
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Name = name[0].upper() + name[1:]
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return template \
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.replace("$name", name) \
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.replace("$Name", Name) \
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.replace("$doc", doc) \
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.replace("$defaultValueStr", str(defaultValueStr))
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if __name__ == "__main__":
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print(header)
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print("\n# DO NOT MODIFY THIS FILE! It was generated by _shared_params_code_gen.py.\n")
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print("from pyspark.ml.param import Param, Params\n\n")
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shared = [
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("maxIter", "max number of iterations (>= 0)", None),
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("regParam", "regularization parameter (>= 0)", None),
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("featuresCol", "features column name", "'features'"),
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("labelCol", "label column name", "'label'"),
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("predictionCol", "prediction column name", "'prediction'"),
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("probabilityCol", "Column name for predicted class conditional probabilities. " +
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"Note: Not all models output well-calibrated probability estimates! These probabilities " +
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"should be treated as confidences, not precise probabilities.", "'probability'"),
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("rawPredictionCol", "raw prediction (a.k.a. confidence) column name", "'rawPrediction'"),
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("inputCol", "input column name", None),
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("inputCols", "input column names", None),
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("outputCol", "output column name", None),
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("numFeatures", "number of features", None),
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("checkpointInterval", "checkpoint interval (>= 1)", None),
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("seed", "random seed", "hash(type(self).__name__)"),
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("tol", "the convergence tolerance for iterative algorithms", None),
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("stepSize", "Step size to be used for each iteration of optimization.", None)]
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code = []
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for name, doc, defaultValueStr in shared:
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param_code = _gen_param_header(name, doc, defaultValueStr)
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code.append(param_code + "\n" + _gen_param_code(name, doc, defaultValueStr))
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decisionTreeParams = [
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("maxDepth", "Maximum depth of the tree. (>= 0) E.g., depth 0 means 1 leaf node; " +
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"depth 1 means 1 internal node + 2 leaf nodes."),
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("maxBins", "Max number of bins for" +
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" discretizing continuous features. Must be >=2 and >= number of categories for any" +
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" categorical feature."),
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("minInstancesPerNode", "Minimum number of instances each child must have after split. " +
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"If a split causes the left or right child to have fewer than minInstancesPerNode, the " +
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"split will be discarded as invalid. Should be >= 1."),
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("minInfoGain", "Minimum information gain for a split to be considered at a tree node."),
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("maxMemoryInMB", "Maximum memory in MB allocated to histogram aggregation."),
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("cacheNodeIds", "If false, the algorithm will pass trees to executors to match " +
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"instances with nodes. If true, the algorithm will cache node IDs for each instance. " +
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"Caching can speed up training of deeper trees.")]
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decisionTreeCode = '''class DecisionTreeParams(Params):
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"""
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Mixin for Decision Tree parameters.
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"""
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# a placeholder to make it appear in the generated doc
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$dummyPlaceHolders
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def __init__(self):
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super(DecisionTreeParams, self).__init__()
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$realParams'''
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dtParamMethods = ""
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dummyPlaceholders = ""
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realParams = ""
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paramTemplate = """$name = Param($owner, "$name", "$doc")"""
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for name, doc in decisionTreeParams:
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variable = paramTemplate.replace("$name", name).replace("$doc", doc)
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dummyPlaceholders += variable.replace("$owner", "Params._dummy()") + "\n "
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realParams += "#: param for " + doc + "\n "
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realParams += "self." + variable.replace("$owner", "self") + "\n "
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dtParamMethods += _gen_param_code(name, doc, None) + "\n"
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code.append(decisionTreeCode.replace("$dummyPlaceHolders", dummyPlaceholders)
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.replace("$realParams", realParams) + dtParamMethods)
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print("\n\n\n".join(code))
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