How to change the spark Session configuration in Pyspark

Question

I am trying to change the default configuration of Spark Session. But it is not working.

spark_session  = SparkSession.builder
                      .master("ip")
                      .enableHiveSupport()
                      .getOrCreate()

spark_session.conf.set("spark.executor.memory", '8g')
spark_session.conf.set('spark.executor.cores', '3')
spark_session.conf.set('spark.cores.max', '3')
spark_session.conf.set("spark.driver.memory",'8g')
sc = spark_session.sparkContext

But if I put the configuration in Spark submit, then it works fine for me.

spark-submit --master ip --executor-cores=3 --diver 8G sample.py