Repository navigation
Add support for loop.sock_sendto #561
Description
- uvloop version: 0.17.0 - 0.20.0
- Python version: 3.11.4 - 3.12.5
- Platform: Linux
- Can you reproduce the bug with
PYTHONASYNCIODEBUGin env?: Not a bug - Does uvloop behave differently from vanilla asyncio? How?: Yes, not implemented feature
The uvloop not implement method sock_sendto.
coroutine loop.sock_sendto(sock, data, address)
Send a datagram from sock to address. Asynchronous version of socket.sendto()Return the number of bytes sent.
sock must be a non-blocking socket.
New in version 3.11.
The simple test case that reproduces the problem:
#!/usr/bin/env python3
import socket
import asyncio
import uvloop
uvloop.install()
async def run():
addr = ("127.0.0.1", 1111)
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.setblocking(False)
loop = asyncio.get_running_loop()
await loop.sock_sendto(s, b'test', addr)
asyncio.run(run())
uvloop == 0.20.0 response:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.12/asyncio/runners.py", line 194, in run
return runner.run(main)
^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
return self._loop.run_until_complete(task)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "uvloop/loop.pyx", line 1517, in uvloop.loop.Loop.run_until_complete
File "<stdin>", line 6, in run
File "uvloop/loop.pyx", line 2629, in sock_sendto
NotImplementedError
Activity
WilliamOConnell commentedon Aug 7, 2024
I had a similar issue with
sock_recvfrom. It took me a while to figure out what was going on because I was using Sanic and hadn't actually heard ofuvloop. I got around it by disabling it in the Sanic config but it would be nice if these methods could be implemented.difeid commentedon Aug 27, 2024
Yes,
sock_recvfromis also not implementeduvloop/loop.pyx
aldem commentedon Nov 15, 2025
I recently stumbled upon this while working on multicast communication, and I was really surprised to find that switching from asyncio to uvloop broke it.
It would be great to see this implemented.
KaylaSolace commentedon Aug 12, 2026
sad to see this still isnt supported.
tarasko commentedon Aug 13, 2026
Hey guys, @aldem @KaylaSolace @difeid
aiofastnet provides drop-in implementations for
sock_recvfrom,sock_recvfrom_into,sock_sendto.Depending on you project, you can use them either directly:
or just patch the current loop (which can be uvloop)