code: def main():
      """Main funciton"""
      parser = argparse.ArgumentParser()
      parser.add_argument(
          "--host",
          type=str,
          default="0.0.0.0",
          help="The host IP address the server binds to",
      )
      parser.add_argument(
          "--port", type=int, default=9091, help="The port of the RPC"
      )
      parser.add_argument(
          "--port-end",
          type=int,
          default=9199,
          help="The end search port of the RPC",
      )
      parser.add_argument(
          "--key",
          type=str,
          default="",
          help="RPC key used to identify the connection type.",
      )
      parser.add_argument(
          "--tracker",
          type=str,
          default="",
          help="Report to RPC tracker",
      )
      args = parser.parse_args()
      logging.basicConfig(level=logging.INFO)
  
      if args.tracker:
          url, port = args.tracker.split(":")
          port = int(port)
          tracker_addr = (url, port)
          if not args.key:
              raise RuntimeError(
                  "Need key to present type of resource when tracker is available"
              )
      else:
          tracker_addr = None
  
      # register the initialization callback
      def server_init_callback():
          # pylint: disable=redefined-outer-name, reimported, import-outside-toplevel, import-self
          import tvm
          import vta.exec.rpc_server
  
          tvm.register_func(
              "tvm.rpc.server.start",
              vta.exec.rpc_server.server_start,
              override=True,
          )
  
      server = rpc.Server(
          args.host,
          args.port,
          args.port_end,
          key=args.key,
          tracker_addr=tracker_addr,
          server_init_callback=server_init_callback,
      )
      server.proc.join()
  
file_path: tvm/vta/python/vta/exec/rpc_server.py
imports: from __future__ import absolute_import
  import logging
  import argparse
  import os
  import ctypes
  import json
  import tvm
  from tvm import rpc
  from tvm.contrib import cc
  from vta import program_bitstream
  from ..environment import get_env, pkg_config
  from ..libinfo import find_libvta
label_desc: Use image node_id 2 for calling a global function with example usage: main() without return types