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Tagged with python-asyncio python-3.x
2,161 questions
0
votes
1
answer
23
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Asyncio: read new data from process stdout without blocking monitoring task
I write asynchronous process manager, and up till now I came up with this:
import asyncio
class AsyncLocalProcessManager:
def __init__(self):
self.process = None
async def submit(...
- 397
0
votes
3
answers
134
views
Converting Python socket server to Asyncio
I have already converted a multi-treaded HTTP proxy ran by a socket server into a single-treaded proxy ran by Asyncio. And, it works well for HTTP. However, when I try to reproduce the same with SSL ...
- 70
0
votes
0
answers
39
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Error processing SNMP request: Component value is tag-incompatible
I am trying to write a mock snmp server using pysnmp library in python.
https://pypi.org/project/pysnmp/
I start the server using,
python mock_snmp_server.py
python --version gives Python 3.11.4
I ...
- 107
1
vote
1
answer
48
views
pyserial-asyncio client/server in Python 3.8 not communicating immediately
I'm learning python and asyncio and after having success with asyncio for a TCP client/server I took my first stab at creating a serial client/server using pyserial-asyncio running in bash on a ...
- 206k
1
vote
2
answers
91
views
How to gracefully stop an asyncio server in python 3.8
As part of learning python and asyncio I have a simple TCP client/server architecture using asyncio (I have reasons why I need to use that) where I want the server to completely exit when it receives ...
- 206k
0
votes
1
answer
46
views
datetime.strptime() is blocking asyncio.Queue.get() [duplicate]
In the following code datetime.strptime() is blocking asyncio.Queue.get() operation
import time
import asyncio
from datetime import datetime
from functools import partial
def write(queue):
data =...
- 1,880
1
vote
1
answer
57
views
Using a dict for caching async function result does not use cached results
BASE_URL = "https://query2.finance.yahoo.com/"
DATA_URL_PART = "v8/finance/chart/{ticker}"
async def fetch_close_price(aiosession: aiohttp.ClientSession,
...
- 148
0
votes
2
answers
95
views
Creating a stoppable background task in Python
I want to run some function in the background, but be able to shut it down at will. I tried a bunch of solutions, the most obvious of which is asyncio tasks:
# Data source
DataSource = Generator[int, ...
- 25
1
vote
1
answer
85
views
How to trace the caller of an async function in VS Code Debug mode when the call stack is lost?
I am debugging a Python async function in VS Code, and I have hit a breakpoint inside the function. However, the call stack in the debug panel does not show the parent function that called it. Since ...
- 1,765
0
votes
2
answers
143
views
How to flatten a bunch of asynchronous generators asynchronously?
I have a bunch of webpages to scrape, these webpages have addresses that differ only in page number thus can be processed in parallel using aiohttp.
Now I am using an asynchronous function to process ...
- 3,822
2
votes
1
answer
101
views
Why is Python's IsolatedAsyncioTestCase so slow?
I'm working on writing test cases for some Python code that uses asyncio. I'm noticing a significant performance degradation when my test classes inherit from unittest.IsolatedAsyncioTestCase vs. ...
- 61k
0
votes
0
answers
118
views
How can I reuse the existing asyncpg connection pool?
asyncpg.pool should be created at the first request and then reused for the next groups of requests. After the first successful use of the pool, an error occurs during reuse.
Environment:
Windows 10 ...
- 1
0
votes
2
answers
286
views
Is it safe to create asyncio event loop in one thread and run it in another thread while having ability to cancel it from outside the thread (python3)
I want to know if it's safe to create an asyncio event loop in one thread and run the loop in another while having the ability to cancel it from outside the thread in which the event loop is running. ...
- 130
1
vote
1
answer
51
views
How to run dependence tasks concurrently with non-dependence ones, and tasks inside for loop?
I am learning asyncio and there is a problem of running a dependence task concurrently with non-dependence ones. So far I couldn't make it work. This is my code:
import asyncio
import random
def ...
- 1,030
0
votes
1
answer
217
views
Cannot access path in websockets.serve handler
I cannot find a way to access the path of a websocket connection, docs say Receiving the request path in the second parameter of connection handlers is deprecated.
python version: 3.12.6
websockets ...
- 15