holdenk commented on a change in pull request #23741: [SPARK-22798][PYTHON][ML]Add multiple column support to PySpark StringIndexer URL: https://github.com/apache/spark/pull/23741#discussion_r257438503
########## File path: python/pyspark/ml/wrapper.py ########## @@ -87,9 +87,19 @@ def _new_java_array(pylist, java_class): - bool -> sc._gateway.jvm.java.lang.Boolean """ sc = SparkContext._active_spark_context - java_array = sc._gateway.new_array(java_class, len(pylist)) - for i in xrange(len(pylist)): - java_array[i] = pylist[i] + java_array = None + if len(pylist) > 0 and isinstance(pylist[0], list): + inner_array_length = 0 + for i in xrange(len(pylist)): + inner_array_length = max(inner_array_length, len(pylist[i])) + java_array = sc._gateway.new_array(java_class, len(pylist), inner_array_length) Review comment: I think we now have this in https://github.com/apache/spark/pull/23741/files#diff-898790f48e214f86080160b45fcf81cfR102 ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org