code: def stop(self):
          
          if getattr(self, "_jsc", None):
              try:
                  self._jsc.stop()
              except Py4JError:
                  # Case: SPARK-18523
                  warnings.warn(
                      'Unable to cleanly shutdown Spark JVM process.'
                      ' It is possible that the process has crashed,'
                      ' been killed or may also be in a zombie state.',
                      RuntimeWarning
                  )
              finally:
                  self._jsc = None
          if getattr(self, "_accumulatorServer", None):
              self._accumulatorServer.shutdown()
              self._accumulatorServer = None
          with SparkContext._lock:
              SparkContext._active_spark_context = None
docs: Shut down the SparkContext.