rangadi opened a new pull request, #41343:
URL: https://github.com/apache/spark/pull/41343

   ### What changes were proposed in this pull request?
   This updated Protobuf Pyspark API to allow passing binary FileDescriptorSet 
rather than a file name. This is a Python follow up to feature implemented in 
Scala in #41192. 
   
   ### Why are the changes needed?
     - This allows flexibility for Pyspark users to provide binary descriptor 
set directly.
     - Even if users are using file path, Pyspark avoids passing file name to 
Scala and reads the descriptor file in Python. This avoids having to read the 
file in Scala. 
   
   ### Does this PR introduce _any_ user-facing change?
   
     - This adds extra arg to `from_protobuf()` and `to_protobuf()` API. 
   
   ### How was this patch tested?
     - Doc tests
     - Manual tests
   
   


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