Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/5147#issuecomment-85275593
I'm a little hesitant to want to add a new `withPartition` or
`withSplit`-like method, since we've been deprecating those in favor of using
things like TaskContext. Can you address your use-case with `TaskContext.get`
and `printPipeContext`? For example, how about this:
```scala
myRDD.pipe(
command="....",
printPipeContext = (p => p("PARTITION=" + TaskContext.get.partitionId())
```
Is the problem that you want to be able to store the partition as part of
the command or environment? If so, then maybe we could generalize this so that
the function is invoked with a TaskContext instead of a Partition (in other
words, change it to pipeWithContext).
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