bsikander commented on pull request #9583:
URL: https://github.com/apache/beam/pull/9583#issuecomment-628757670


   thank you for a quick reply.
   
   My current usecase is to run a python sub shell from Java dataflow job. 
Since custom containers are not supported what are my options? One option I 
found was to implement `@Setup` method of `DoFn` and execute `apt install 
python3 && ...` commands.
   
   Is this approach fine or there are other alternatives?


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