code: def main(driver_addresses, settings):
      # prepend HOROVOD_SPARK_PYTHONPATH to PYTHONPATH
      if "HOROVOD_SPARK_PYTHONPATH" in os.environ:
          ppath = os.environ["HOROVOD_SPARK_PYTHONPATH"]
  
          # add injected HOROVOD_SPARK_PYTHONPATH to sys.path
          for p in reversed(ppath.split(os.pathsep)):
              sys.path.insert(
                  1, p
              )  # don't put it in front which is usually .
  
          if "PYTHONPATH" in os.environ:
              ppath = os.pathsep.join([ppath, os.environ["PYTHONPATH"]])
          os.environ["PYTHONPATH"] = ppath
  
      # change current working dir to where the Spark worker runs
      # because orted runs this script where mpirun was executed
      # this env var is injected by the Spark task service
      work_dir = os.environ.get("HOROVOD_SPARK_WORK_DIR")
      if work_dir:
          if settings.verbose >= 2:
              print(
                  "Changing cwd from {} to {}".format(
                      os.getcwd(), work_dir
                  )
              )
          os.chdir(work_dir)
  
      task_exec(
          driver_addresses,
          settings,
          "OMPI_COMM_WORLD_RANK",
          "OMPI_COMM_WORLD_LOCAL_RANK",
      )
  
imports: import os
  import sys
  from horovod.spark.task import task_exec
  from horovod.runner.common.util import codec
label_desc: Use image node_id 1 for calling a global function with example usage: main(driver_addresses, settings) without return types