spark-2.x/src/main/python/spark_sql.py
spark-3.x/src/main/python/spark_sql.py

spark-2.x/src/main/python/spark_oss.py
spark-3.x/src/main/python/spark_sql.py

spark-2.x/src/main/python/spark_sql.py
spark-3.x/src/main/python/spark_oss.py

spark-2.x/src/main/python/spark_oss.py
spark-3.x/src/main/python/spark_oss.py