new_contents: #!/usr/bin/evn python3
  import time
  import asyncio
  t = time.time()
  async def printer(name):
      print('Started %s at %.1f' % (name, time.time() - t))
      await asyncio.sleep(0.2)
      print('Finished %s at %.1f' % (name, time.time() - t))
  loop = asyncio.get_event_loop()
  result = loop.call_at(loop.time() + .2, loop.create_task, printer('call_at'))
  result = loop.call_later(.1, loop.create_task, printer('call_later'))
  result = loop.call_soon(loop.create_task, printer('call_soon'))
  result = loop.call_soon_threadsafe(loop.create_task, printer('call_soon_threadsafe'))
  # Make sure we stop after a second
  result = loop.call_later(1, loop.stop)
  loop.run_forever()
  
subject: add asyncio_test.py