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  1. import asyncio
  2.  
  3. @asyncio.coroutine
  4. def task(dur):
  5. 	print("task start")
  6. 	yield from asyncio.sleep(dur)		# time-consuming task
  7. 	print("task finished")
  8. 	return "result of the %s task" % ['long','short'][dur%2]
  9.  
  10. def main():
  11. 	print("starting a long task")
  12. 	x = asyncio.async(task(4))		# start the task
  13. 	yield from asyncio.sleep(0.5)	# do something else
  14. 	print("half a sec later")
  15. 	yield from asyncio.sleep(1)		# do something else again
  16. 	print("a sec more")
  17. 	result = yield from x			# now we need to use the result
  18. 	print("yielded result: %s" % result)
  19. 	yield from asyncio.sleep(1)
  20. 	# But what if the task is short?
  21. 	print("starting a short task")
  22. 	x = asyncio.async(task(1))		# start the task
  23. 	yield from asyncio.sleep(0.5)	# do something else
  24. 	print("half a sec later")
  25. 	yield from asyncio.sleep(1)		# do something else again
  26. 	print("a sec more")
  27. 	result = yield from x			# now we need to use the result
  28. 	print("yielded result: %s" % result)
  29. 	yield from asyncio.sleep(1)
  30. 	print("finished")
  31.  
  32. loop = asyncio.get_event_loop()
  33. loop.run_until_complete(main())
Success #stdin #stdout 0.12s 15768KB
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stdin
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Standard input is empty
stdout
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starting a long task
task start
half a sec later
a sec more
task finished
yielded result: result of the long task
starting a short task
task start
half a sec later
task finished
a sec more
yielded result: result of the short task
finished
https://ideone.com/jWM9r9
language:
Python 3 (python  3.9.5)
created:
9 years ago
visibility:
public

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