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I am learning PySpark and come across UDFs. I am not able to understand the diff between Python Functions and UDF in PySpark?

What is the need to use UDF instead of using Functions?

AngiSen
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    There are some operations that may not be easily possible using only the Spark API Functions. – pault Sep 19 '18 at 13:51
  • Related: [Spark functions vs UDF performance?](https://stackoverflow.com/a/38297050/5858851) – pault Sep 19 '18 at 13:51

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