new_contents: #!/usr/bin/env python
  
  """https://docs.python.org/3.7/library/asyncio-task.html 変奏版
  
  Features:
  - asyncio.gather()
  - asyncio.sleep()
  - asyncio.run()
  """
  
  import asyncio
  import logging
  import time
  
  concurrent = 3
  delay = 5
  
  # PYTHONASYNCIODEBUG=1
  logging.basicConfig(level=logging.DEBUG)
  
  async def async_pause():
      await asyncio.sleep(delay)
      return 0
  
  async def sync_pause():
      time.sleep(delay)
      return 0
  
  async def main():
      """Schedule three calls *concurrently*"""
  
      tasks = [
          async_pause() for _ in range(concurrent)]
      await asyncio.gather(*tasks)
  
      tasks =[
          sync_pause() for _ in range(concurrent)]
      await asyncio.gather(*tasks)
  
  # PYTHONASYNCIODEBUG=1
  asyncio.run(main(), debug=True)
  
subject: Add a script that can be used to compare asyncio.sleep to time.sleep