Github user lw-lin commented on a diff in the pull request:
https://github.com/apache/spark/pull/14118#discussion_r79088096
--- Diff: python/pyspark/sql/readwriter.py ---
@@ -329,7 +329,8 @@ def csv(self, path, schema=None, sep=None,
encoding=None, quote=None, escape=Non
being read should be skipped. If
None is set, it uses
the default value, ``false``.
:param nullValue: sets the string representation of a null value.
If None is set, it uses
- the default value, empty string.
+ the default value, empty string. Since 2.0.1,
this ``nullValue`` param
--- End diff --
This patch introduces a behavior change, i.e. how we deal with `nullValue`
for the string type. So let's keep the "since x.y.z" thing for people to find a
clue?
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