Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/12494#discussion_r60526159
--- Diff: python/pyspark/sql/readwriter.py ---
@@ -367,16 +370,19 @@ def format(self, source):
@since(1.5)
def option(self, key, value):
"""Adds an output option for the underlying data source.
+
+ >>> csvpath = os.path.join(tempfile.mkdtemp(), 'data')
+ >>> df.write.option('quote', None).format('csv').save(csvpath)
--- End diff --
I added null check that disallows null input.
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