test.py

import asyncio
import threading
import time


def thread_func():
    print('thread_func: start')
    async def inner_async(loop):
        print('inner_async: start')
        await asyncio.sleep(1, loop=loop)
        print('inner_async: finish')

    time.sleep(2)
    loop = asyncio.get_event_loop()
    loop.run_until_complete(inner_async(loop))
    print('thread_func: finish')


async def async_func(loop):
    print('async_func: start')
    await asyncio.sleep(1, loop=loop)
    print('async_func: finish')


thread = threading.Thread(target=thread_func)
thread.start()

print('main thread getting event loop')
loop = asyncio.get_event_loop()
loop.run_until_complete(async_func(loop))

thread.join()

testoutput

thread_func: start
main thread getting event loop
async_func: start
async_func: finish
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.5/threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
  File "examples/deploy.py", line 14, in thread_func
    loop = asyncio.get_event_loop()
  File "/usr/lib/python3.5/asyncio/events.py", line 632, in get_event_loop
    return get_event_loop_policy().get_event_loop()
  File "/usr/lib/python3.5/asyncio/events.py", line 578, in get_event_loop
    % threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'Thread-1'.