new_contents: #!/usr/bin/env python3
  """Example of announcing 250 services (in this case, a fake HTTP server)."""
  
  import argparse
  import asyncio
  import logging
  import socket
  import time
  from typing import List
  
  from zeroconf import IPVersion
  from zeroconf.asyncio import AsyncServiceInfo, AsyncZeroconf
  
  
  async def register_services(infos: List[AsyncServiceInfo]) -> None:
      tasks = [aiozc.async_register_service(info) for info in infos]
      background_tasks = await asyncio.gather(*tasks)
      await asyncio.gather(*background_tasks)
  
  
  async def unregister_services(infos: List[AsyncServiceInfo]) -> None:
      tasks = [aiozc.async_unregister_service(info) for info in infos]
      background_tasks = await asyncio.gather(*tasks)
      await asyncio.gather(*background_tasks)
  
  
  async def close_aiozc(aiozc: AsyncZeroconf) -> None:
      await aiozc.async_close()
  
  
  if __name__ == '__main__':
      logging.basicConfig(level=logging.DEBUG)
  
      parser = argparse.ArgumentParser()
      parser.add_argument('--debug', action='store_true')
      version_group = parser.add_mutually_exclusive_group()
      version_group.add_argument('--v6', action='store_true')
      version_group.add_argument('--v6-only', action='store_true')
      args = parser.parse_args()
  
      if args.debug:
          logging.getLogger('zeroconf').setLevel(logging.DEBUG)
      if args.v6:
          ip_version = IPVersion.All
      elif args.v6_only:
          ip_version = IPVersion.V6Only
      else:
          ip_version = IPVersion.V4Only
  
      infos = []
      for i in range(250):
          infos.append(
              AsyncServiceInfo(
                  "_http._tcp.local.",
                  f"Paul's Test Web Site {i}._http._tcp.local.",
                  addresses=[socket.inet_aton("127.0.0.1")],
                  port=80,
                  properties={'path': '/~paulsm/'},
                  server=f"zcdemohost-{i}.local.",
              )
          )
  
      print("Registration of 250 services, press Ctrl-C to exit...")
      aiozc = AsyncZeroconf(ip_version=ip_version)
      loop = asyncio.get_event_loop()
      loop.run_until_complete(register_services(infos))
      print("Registration complete.")
      try:
          while True:
              time.sleep(0.1)
      except KeyboardInterrupt:
          pass
      finally:
          print("Unregistering...")
          loop.run_until_complete(unregister_services(infos))
          print("Unregistration complete.")
          loop.run_until_complete(close_aiozc(aiozc))
  
subject: Add async_register_service/async_unregister_service example (#414)