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r r r r s � � � � � ��Dr r �returnc �d � t j } | �| S t � � � } | �| S dt j v rGddl} |j }n # t $ r |j j }Y nw xY w |� � �dS n# t $ r Y nw xY wdt j v rddl m } |� � rdS t d� � �)ae Detect which async library is currently running.
The following libraries are currently supported:
================ =========== ============================
Library Requires Magic string
================ =========== ============================
**Trio** Trio v0.6+ ``"trio"``
**Curio** - ``"curio"``
**asyncio** ``"asyncio"``
**Trio-asyncio** v0.8.2+ ``"trio"`` or ``"asyncio"``,
depending on current mode
================ =========== ============================
Returns:
A string like ``"trio"``.
Raises:
AsyncLibraryNotFoundError: if called from synchronous context,
or if the current async library was not recognized.
Examples:
.. code-block:: python3
from sniffio import current_async_library
async def generic_sleep(seconds):
library = current_async_library()
if library == "trio":
import trio
await trio.sleep(seconds)
elif library == "asyncio":
import asyncio
await asyncio.sleep(seconds)
# ... and so on ...
else:
raise RuntimeError(f"Unsupported library {library!r}")
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