import trio
from async_generator import async_generator, yield_
@async_generator
async def items():
 for i in range(10):
 await yield_(i)
async def main():
 async for i in items():
 if i > 4:
 break
 print(i)
if __name__ == '__main__':
 trio.run(main)

Exception ignored in: <bound method AsyncGenerator.__del__ of <async_generator._impl.AsyncGenerator object at 0x110a9b908>>
Traceback (most recent call last):
 File ".../python3.5/site-packages/async_generator/_impl.py", line 324, in __del__
 .format(self._coroutine.cr_frame.f_code.co_name)
RuntimeError: partially-exhausted async_generator 'items' garbage collected