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https://issues.apache.org/jira/browse/SPARK-6553?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Rosen resolved SPARK-6553.
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Resolution: Fixed
Fix Version/s: 1.4.0
1.3.1
> Support for functools.partial as UserDefinedFunction
> ----------------------------------------------------
>
> Key: SPARK-6553
> URL: https://issues.apache.org/jira/browse/SPARK-6553
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 1.3.0
> Reporter: Kalle Jepsen
> Assignee: Kalle Jepsen
> Labels: features
> Fix For: 1.3.1, 1.4.0
>
>
> Currently {{functools.partial}} s cannot be used as {{UserDefinedFunction}} s
> for {{DataFrame}} s, as the {{\_\_name\_\_}} attribute does not exist.
> Passing a {{functools.partial}} object will raise an Exception at
> https://github.com/apache/spark/blob/master/python/pyspark/sql/functions.py#L126.
>
> {{functools.partial}} is very widely used and should probably be supported,
> despite its lack of a {{\_\_name\_\_}}.
> My suggestion is to use {{f.\_\_repr\_\_()}} instead, or check with
> {{hasattr(f, '\_\_name\_\_)}} and use {{\_\_class\_\_}} if {{False}}.
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