Github user mateiz commented on a diff in the pull request:
https://github.com/apache/spark/pull/1309#discussion_r15726416
--- Diff: core/src/main/scala/org/apache/spark/Accumulators.scala ---
@@ -91,6 +100,16 @@ class Accumulable[R, T] (
}
/**
+ * Function to customize printing values of this accumulator.
+ */
+ def prettyValue(_value: R) = s"$value"
--- End diff --
Actually I realize that putting this in AccumulatorParam / AccumulableParam
would be a breaking API change, because those are traits. What about just
leaving this feature out for now? People can always wrap stuff in their own
data type with their own toString.
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