async example modify a global dict

async_example.py

# coding: utf-8

import asyncio

g = {'num': 1}

async def add(g, num=1):
    print(f'origin {num} from', g['num'])
    await asyncio.sleep(10)
    print(f'do add {num} from', g['num'])
    g['num'] += num


_funcs = (add(g, 1), add(g,2), add(g,5))

loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.gather(*_funcs))
loop.close()

print(g)