old_contents: from pythonosc.osc_server import AsyncIOOSCUDPServer
  from pythonosc.dispatcher import Dispatcher
  import asyncio
  
  
  def filter_handler(address, *args):
      print(f"{address}: {args}")
  
  
  dispatcher = Dispatcher()
  dispatcher.map("/filter", filter_handler)
  
  ip = "127.0.0.1"
  port = 1337
  
  
  async def loop():
      """Example main loop that only runs for 10 iterations before finishing"""
      for i in range(10):
          print(f"Loop {i}")
          await asyncio.sleep(1)
  
  
  async def init_main():
      server = AsyncIOOSCUDPServer((ip, port), dispatcher, asyncio.get_event_loop())
      transport, protocol = await server.create_serve_endpoint()  # Create datagram endpoint and start serving
  
      await loop()  # Enter main loop of program
  
      transport.close()  # Clean up serve endpoint
  
  
  asyncio.run(init_main())
  
new_contents: import sys
  from pythonosc.osc_server import AsyncIOOSCUDPServer
  from pythonosc.dispatcher import Dispatcher
  import asyncio
  
  
  def filter_handler(address, *args):
      print(f"{address}: {args}")
  
  
  dispatcher = Dispatcher()
  dispatcher.map("/filter", filter_handler)
  
  ip = "127.0.0.1"
  port = 1337
  
  
  async def loop():
      """Example main loop that only runs for 10 iterations before finishing"""
      for i in range(10):
          print(f"Loop {i}")
          await asyncio.sleep(1)
  
  
  async def init_main():
      server = AsyncIOOSCUDPServer((ip, port), dispatcher, asyncio.get_event_loop())
      transport, protocol = await server.create_serve_endpoint()  # Create datagram endpoint and start serving
  
      await loop()  # Enter main loop of program
  
      transport.close()  # Clean up serve endpoint
  
  
  if sys.version_info >= (3, 7):
      asyncio.run(init_main())
  else:
      # TODO(python-upgrade): drop this once 3.6 is no longer supported
      event_loop = asyncio.get_event_loop()
      event_loop.run_until_complete(init_main())
      event_loop.close()
  
subject: Support Python 3.6 event loops in this example