Github user Lewuathe commented on a diff in the pull request:
https://github.com/apache/spark/pull/9595#discussion_r46245196
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala ---
@@ -17,16 +17,30 @@
package org.apache.spark.ml.source.libsvm
+import java.io.{CharArrayWriter, IOException}
+
+import com.fasterxml.jackson.core.JsonFactory
import com.google.common.base.Objects
+import org.apache.hadoop.fs.{Path, FileStatus}
+import org.apache.hadoop.io.{NullWritable, Text}
+import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat
+import org.apache.hadoop.mapreduce.{RecordWriter, TaskAttemptContext}
import org.apache.spark.Logging
import org.apache.spark.annotation.Since
+import org.apache.spark.broadcast.Broadcast
+import org.apache.spark.deploy.SparkHadoopUtil
+import org.apache.spark.mapred.SparkHadoopMapRedUtil
import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
import org.apache.spark.mllib.util.MLUtils
import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{DataFrameReader, DataFrame, Row, SQLContext}
--- End diff --
Is it necessary to change to under score? We can keep this.
```
import org.apache.spark.sql.{DataFrameReader, DataFrame, Row, SQLContext}
```
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