asyncio traceback

import asyncio
import json
import sys

async def run_division(a, b):
    await asyncio.sleep(2)
    return a / b

# context to JSON
def custom_exception_handler(loop, context):
    # first, handle with default handler
    #loop.default_exception_handler(context)
    err = json.dumps({'message':context.get('message'), 'exception':context.get('exception'), 'future':context.get('future')}, default=str)
    print(err)
    # TODO: add traceback to err

# define loop
loop = asyncio.get_event_loop()

# set custom handler
loop.set_exception_handler(custom_exception_handler)
loop.create_task(run_division(1, 0))
loop.run_forever()