Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/17865#discussion_r123184653
--- Diff: python/pyspark/sql/functions.py ---
@@ -793,9 +824,9 @@ def date_format(date, format):
.. note:: Use when ever possible specialized functions like `year`.
These benefit from a
specialized implementation.
- >>> df = spark.createDataFrame([('2015-04-08',)], ['a'])
- >>> df.select(date_format('a', 'MM/dd/yyy').alias('date')).collect()
- [Row(date=u'04/08/2015')]
+ >>> df = spark.createDataFrame([('2015-04-08',)], ['dt'])
+ >>> df.select(date_format('dt', 'MM/dd/yyy').alias('dt2')).collect()
--- End diff --
`date` to `dt2` sounds unnecessary change.
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