Github user jkbradley commented on a diff in the pull request: https://github.com/apache/spark/pull/18742#discussion_r131749278 --- Diff: python/pyspark/ml/util.py --- @@ -283,3 +333,201 @@ def numFeatures(self): Returns the number of features the model was trained on. If unknown, returns -1 """ return self._call_java("numFeatures") + + +@inherit_doc +class DefaultParamsWritable(MLWritable): + """ + .. note:: DeveloperApi + + Helper trait for making simple :py:class`Params` types writable. If a :py:class`Params` + class stores all data as :py:class:'Param' values, then extending this trait will provide --- End diff -- Does normal tick ' work, or do you have to use backticks ` ?
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