Github user BryanCutler commented on the issue:
https://github.com/apache/spark/pull/14303
@eastlondoner , the import error you show indicates that `accumulators` has
already been imported. I was able to run the steps in your reproduction
without error, but I did accidentally get the error one time when I forgot to
add the py4j to the sys path and the `context` module was partially loaded with
`accumulators`, so when I called 'import pyspark' again, I got the same import
error as you.
Can you verify that there were no previous import attempts when you receive
this error?
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