This was my approach:
def _detect_running_asynclib() -> str:
if 'trio' in sys.modules:
from trio.hazmat import current_trio_token
try:
current_trio_token()
except RuntimeError:
pass
else:
return 'trio'
if 'curio' in sys.modules:
from curio.meta import curio_running
if curio_running():
return 'curio'
if 'asyncio' in sys.modules:
from .backends.asyncio import get_running_loop
if get_running_loop() is not None:
return 'asyncio'
raise LookupError('Cannot find any running async event loop')
Is there something wrong with this?
to, 2018-08-16 kello 00:01 -0700, Nathaniel Smith kirjoitti:
> Hi all,
> A number of people are working on packages that support multiple
> asyncbackends (e.g., asyncio + trio, or trio + curio, or trio +
> twisted,...). So then the question arises... how can I figure out
> which asynclibrary my user is actually using?
> Answer: install sniffio, and then
> callsniffio.current_async_library(), and it tells you.
> Well, right now it only works for trio and asyncio, but if
> youmaintain an async library and you want to make it easier for
> packagesto detect you, then it's easy to add support – see the
> manual. Weconsidered various clever things, but ultimately decided
> that the bestapproach was to use a ContextVar and make it the
> coroutine runner'sresponsibility to advertise which async flavor it
> uses. In particular,this approach works even for hybrid programs that
> are using multiplecoroutine runners in the same loop, like a Twisted
> program withasyncio-flavored and twisted-flavored coroutines in the
> same thread,or a Trio program using trio-asyncio to run both asyncio-
> flavored andtrio-flavored coroutines in the same thread.
> Github: https://github.com/python-trio/sniffioManual:
> https://sniffio.readthedocs.io/PyPI: https://pypi.org/p/sniffio
> -n
>
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