Trio is a Python package for async concurrency and I/O that's obsessed with usability and correctness
Questions tagged [python-trio]
87 questions
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How to combine streams in anyio?
How to iterate over multiple steams at once in anyio, interleaving the items as they appear?
Let's say, I want a simple equivalent of annotate-output. The simplest I could make is
#!/usr/bin/env python3
import dataclasses
from collections.abc…
HoverHell
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Trio WebSocket does not send bytes
The trio documentation recommends the trio-websocket package as a way to handle sockets. I used this recommendation and I'm trying to configure it to work with the server built on the starlette WebSocketEndpoint.
But for some reason, when I try to…
Игорь Платонов
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Trio + PyQT5 in one program?
How can I use trio in conjunction with PyQT5? The thing is that my program has interface written using PyQT5, and now I need to run eventloop trio, to work with the network, because I use trio WebSocket to connect to the server. I read that I should…
Игорь Платонов
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python trio interrogate state of child_tasks
with access to a trio.Nursery instance nursery, how may I print state of all nursery.child_tasks, specifically which have not yet exited?
I'm not understanding, reading docs & the trio NurseryManager code:
how "nested child" tasks might be…
some bits flipped
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catch a break in trio async generator
I have a strange error with an asynchronous trio loop. When I interrupt the loop with break during iteration, I expected the print statement "exit 2" to be printed before the statement "--- Hello ---". But when I run this example, the code after the…
Phil997
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How to use trio_asyncio with legacy sync code in python
I have legacy python application which is synchronous.
I started to use async code inside this application in this way (simplified):
async def loader():
async with trio.open_nursery() as nursery:
# some async tasks started here
await…
eNca
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uwsgi worker hangs on exit, but only if it used async trio module
I have a Django site that uses the trio_cdp package to generate PDFs using a headless Google Chrome. This package is async, but my Django project is sync, so it has to run inside trio.run()
It's also using uwsgi locks so that only one client can…
Mark P
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Getting duplicate packets from AF_PACKET socket
I'm having an odd issue with an AF_PACKET socket and I was wondering if it was due to possible misuse of trio on my behalf, or something else.
I'm writing a TCP SYN port scanner with the goal of making it highly performant. Suppose that I want to…
adder
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Reliably detect that no more packets are coming
I'm writing a TCP SYN port scanner. I spin up 15 tasks that each send 64K / 15 packets to 64K ports, and I have a receiver that sits in a loop and prints the responses. However, some of the packets don't make their way back, making the receiver wait…
adder
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Cannot keyboard interrupt trio/asyncio program (ctrl+c) to exit
The following code works, but fails to exit upon CTRL+c
Can anyone explain why, and how to fix?
It's asyncio code, but I'm using trio-asyncio (forward planning) to allow me to also use trio code.
#!.venv/bin/python
import asyncio
import…
P i
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How can I execute a function on a CPU core, and get a callback when it has completed?
How can I execute a function on a CPU core, and get a callback when it has completed?
Context
I'm recieving a stream:
symbols = ['ABC', 'DFG', ...] # 52 of these
handlers = { symbol: Handler(symbol) for symbol in symbols }
async for symbol,…
P i
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I am using Trio and how do I get the IP address of an already open socket?
This is a simple problem and Im sure there is an solution. I am trying to get the IP address of a socket which I have already connected to. I used trio.serve_tcp(handler, port) to create an server and now I want to know if someone is making…
Kenggi Peters
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what is the exact version of python-trio echo server - multiple client in asyncio?
I am trying to convert the following echo server IRC alike chat terminal into asyncio , but I don't think too much information about trio since it's new, but what is the translation of this to asyncio?
import trio
from itertools import count
from…
etyzz
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I got a trio input function from a friend and it's trying to use trio.lowleve.FdStream, however I can't find it
I'm getting this error: AttributeError: module 'trio.lowlevel' has no attribute 'FdStream'. FdStream isn't in the trio code on git nor in my installation. Is there an alternative to this, or is there a different version I did't find?
merolé
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Right way to terminate a trio program without BrokenResourceError
My app follows a Producer and Consumer pattern. There's a Producer, 2 task (A, B), and a Consumer.
Producer reads an sql table and outputs to A & B. They in turn performs some task on that output and sends to Consumer. Consumer reads from A & B and…
Tinker
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