asyncio.coroutine()

@asyncio.coroutine

Decorator to mark generator-based coroutines. This enables the generator use yield from to call async def coroutines, and also enables the generator to be called by async def coroutines, for instance using an await expression.

There is no need to decorate async def coroutines themselves.

If the generator is not yielded from before it is destroyed, an error message is logged. See Detect coroutines never scheduled.