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Diffstat (limited to 'python/pyspark/ml/param/_gen_shared_params.py')
| -rw-r--r-- | python/pyspark/ml/param/_gen_shared_params.py | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/python/pyspark/ml/param/_gen_shared_params.py b/python/pyspark/ml/param/_gen_shared_params.py new file mode 100644 index 0000000000..5eb81106f1 --- /dev/null +++ b/python/pyspark/ml/param/_gen_shared_params.py @@ -0,0 +1,98 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +header = """# +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +#""" + + +def _gen_param_code(name, doc, defaultValue): + """ + Generates Python code for a shared param class. + + :param name: param name + :param doc: param doc + :param defaultValue: string representation of the param + :return: code string + """ + # TODO: How to correctly inherit instance attributes? + template = '''class Has$Name(Params): + """ + Params with $name. + """ + + # a placeholder to make it appear in the generated doc + $name = Param(Params._dummy(), "$name", "$doc", $defaultValue) + + def __init__(self): + super(Has$Name, self).__init__() + #: param for $doc + self.$name = Param(self, "$name", "$doc", $defaultValue) + + def set$Name(self, value): + """ + Sets the value of :py:attr:`$name`. + """ + self.paramMap[self.$name] = value + return self + + def get$Name(self): + """ + Gets the value of $name or its default value. + """ + if self.$name in self.paramMap: + return self.paramMap[self.$name] + else: + return self.$name.defaultValue''' + + upperCamelName = name[0].upper() + name[1:] + return template \ + .replace("$name", name) \ + .replace("$Name", upperCamelName) \ + .replace("$doc", doc) \ + .replace("$defaultValue", defaultValue) + +if __name__ == "__main__": + print header + print "\n# DO NOT MODIFY. The code is generated by _gen_shared_params.py.\n" + print "from pyspark.ml.param import Param, Params\n\n" + shared = [ + ("maxIter", "max number of iterations", "100"), + ("regParam", "regularization constant", "0.1"), + ("featuresCol", "features column name", "'features'"), + ("labelCol", "label column name", "'label'"), + ("predictionCol", "prediction column name", "'prediction'"), + ("inputCol", "input column name", "'input'"), + ("outputCol", "output column name", "'output'"), + ("numFeatures", "number of features", "1 << 18")] + code = [] + for name, doc, defaultValue in shared: + code.append(_gen_param_code(name, doc, defaultValue)) + print "\n\n\n".join(code) |