Kalle Jepsen created SPARK-6553:
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Summary: 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
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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