HyukjinKwon commented on pull request #30232:
URL: https://github.com/apache/spark/pull/30232#issuecomment-720965482


   BTW, @dongjoon-hyun, seems like Ubuntu 20.04 changed its default Python 
version to Python 3 (?). I think that's why the error message shows a bit weird 
like `b'......`. I saw this symptom before.
   
   Can you try to remove this line 
https://github.com/apache/spark/pull/30232/files#diff-48c0ee97c53013d18d6bbae44648f7fab9af2e0bf5b0dc1ca761e18ec5c478f2R126
 and install Python 2 always in the builds? As far as I remember, the last 
installed Python becomes the default `python`.


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