Github user nchammas commented on a diff in the pull request:
https://github.com/apache/spark/pull/14579#discussion_r74307747
--- Diff: python/pyspark/rdd.py ---
@@ -221,6 +227,21 @@ def context(self):
def cache(self):
"""
Persist this RDD with the default storage level (C{MEMORY_ONLY}).
+
+ :py:meth:`cache` can be used in a 'with' statement. The RDD will
be automatically
+ unpersisted once the 'with' block is exited. Note however that any
actions on the RDD
+ that require the RDD to be cached, should be invoked inside the
'with' block; otherwise,
+ caching will have no effect.
--- End diff --
Agreed, especially since this is technically a new Public API that we are
potentially committing to for the life of the 2.x line.
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