code: def main():
      assert len(sys.argv) <= 2
  
      if "server" in sys.argv:
          main_server(MPI.COMM_WORLD)
      elif "client" in sys.argv:
          main_client(MPI.COMM_WORLD)
      elif "child" in sys.argv:
          main_child()
      else:
          try:
              nchilds = int(sys.argv[1])
          except:
              nchilds = 2
          main_parent(nchilds)
  
file_path: mpi4py/demo/compute-pi/cpi-dpm.py
imports: import sys
  from mpi4py import MPI
  import numpy
label_desc: Use image node_id 10 for calling a global function with example usage: main() without return types