TypeError: A Future, a coroutine or an awaitable is required

When running the example on async of python at https://github.com/ccxt-dev/ccxt/wiki/Manual#synchronous-vs-asynchronous-calls , I get this error:

Traceback (most recent call last):
  File "ccxt_logger.py", line 11, in <module>
    asyncio.get_event_loop().run_until_complete(print_bitfinex_ethbtc_ticker)
  File "anaconda3/lib/python3.6/asyncio/base_events.py", line 446, in run_until_complete
    future = tasks.ensure_future(future, loop=self)
  File "anaconda3/lib/python3.6/asyncio/tasks.py", line 520, in ensure_future
    raise TypeError('A Future, a coroutine or an awaitable is required')
TypeError: A Future, a coroutine or an awaitable is required