Github user yaooqinn commented on the issue:
https://github.com/apache/spark/pull/19840
I can `spark.executorEnv.PYSPARK_PYTHON` in `sparkConf` at executor side ,
because it is set at
[context.py#L156](https://github.com/yaooqinn/spark/blob/8ff5663fe9a32eae79c8ee6bc310409170a8da64/python/pyspark/context.py#L156)
by
[conf.py#L153](https://github.com/yaooqinn/spark/blob/8ff5663fe9a32eae79c8ee6bc310409170a8da64/python/pyspark/conf.py#L153)
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