@cloverstd https://docs.python.org/3/library/asyncio-task.html#example-chain-coroutines
这是 python 的官方示例。这个例子调用的时候也没有 await 调用呀
```
import asyncio

async def compute(x, y):
print("Compute %s + %s ..." % (x, y))
await asyncio.sleep(1.0)
return x + y

async def print_sum(x, y):
result = await compute(x, y)
print("%s + %s = %s" % (x, y, result))

loop = asyncio.get_event_loop()
loop.run_until_complete(print_sum(1, 2))
loop.close()
```