run-until-complete.py

import asyncio


@asyncio.coroutine
def slow_operation(future):
  yield from asyncio.sleep(1)
  future.set_result('Future is done!')

loop = asyncio.get_event_loop()
future = asyncio.Future()
asyncio.ensure_future(slow_operation(future))
loop.run_until_complete(future)
print(future.result())
loop.close()