Github user avulanov commented on a diff in the pull request: https://github.com/apache/spark/pull/12943#discussion_r63086277 --- Diff: python/pyspark/ml/classification.py --- @@ -1117,6 +1137,56 @@ def getBlockSize(self): """ return self.getOrDefault(self.blockSize) + @since("2.0.0") + def setStepSize(self, value): + """ + Sets the value of :py:attr:`stepSize`. + """ + return self._set(stepSize=value) + + @since("2.0.0") + def getStepSize(self): + """ + Gets the value of stepSize or its default value. + """ + return self.getOrDefault(self.stepSize) + + @since("2.0.0") + def setSolver(self, value): + """ + Sets the value of :py:attr:`solver`. + """ + return self._set(solver=value) + + @since("2.0.0") + def getSolver(self): + """ + Gets the value of solver or its default value. + """ + return self.getOrDefault(self.solver) + + @property + @since("2.0.0") + def getOptimizer(self): --- End diff -- Thank you for bringing that issue, @MLnick. `getOptimizer` is there to let the user know explicitly which optimizer is used. The reason why I did not implement `setOpmizer` is because minibatch gradient descent in not very efficient in Spark and can be used only in very specific cases. So the default choice for Spark is L-BFGS. However, if we label `setOpmizer` as `expertParam` then it is OK to have it. I believe that we should proceed as suggested by @yanboliang
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