[PySpark] - Broadcast Variable Pickle Registry Usage?

[Michael Mansour (CS)]

Hi all,

I’m poking around the Pyspark.Broadcast module, and I notice that one can pass 
in a `pickle_registry` and a `path`.  The documentation does not outline the 
pickle registry use and I’m curious about how to use it, and if there are any 
advantages to it.

Thanks,

Michael Mansour