I have a function need an async function def x(f): # f has type of Callable[[], Coroutine[Any, Any, None]]? # …. loop = asyncio.get_event_loop() loop.run_until_complete(f()) And there is an async function with parameters. async def y(a, b): …. So I create a lambda for the parameters. f = lambda: y(a, b) x(f) got the following ..
Category : python-asyncio
I am working on a project where I have a simple socket server looking for connections to reply to the client with a message in a message queue. At the same time, I have a monitoring system using PyWin32 that is looking for changes to files in a directory. When PyWin32 detects a file change, ..
I have an idea of using an event-loop in a websocket-based server (based on websockets library), but I’m struggling to do so, since I really don’t get the idea of how to use asyncio and write your own coroutines. # let us define a dictionary of callbacks awaiting to be triggered CALLBACKS = dict() # ..
I performed the tests on Python 3.9.7 x64, dnspython 2.1.0 and Windows 10 21H1. The problem is very simple: dns.resolver.Resolver() works normally but not dns.asyncresolver.Resolver(), they are supposed to have the same API, however while the former does indeed return results, the latter always times out. Example: In [55]: import dns …: sequential_resolver = dns.resolver.Resolver() ..
Probably this is a dumb question, I know this must be pretty trivial, and probably has been asked many times, but I don’t know the answer and none of the answers I have found through Google solves the problem. The problem is really simple, I used the example code from https://pypi.org/project/async-dns/: import asyncio from async_dns.core ..
I am new to asyncio library and wrote the following code to understand its behaviour CONNECTIONS = 3 REPEAT = 5 async def test(payload): for i in range(REPEAT): print(payload) await asyncio.sleep(1) async def run_test(): loop = asyncio.get_event_loop() for i in range(CONNECTIONS): loop.create_task(test(f"Hello World {i}")) asyncio.run(run_test()) However, when I run it, I got the following output ..
I want to create an asynchronous Queue that restricts the duration an item can live in it starting from when it is put. Once the duration is over for an item, it will be removed and the queue will always have ‘fresh’ items. My attempt is to subclass the asyncio.Queue and overwrite some methods. import ..
I’m trying to load data from a local Postgres database as quickly as possible, and it appears that the most performant python package is [asyncpg][1]. My code is synchronous, and I repeatedly need to load chunks of data. I’m not interested in having the async keyword propagate to every function I’ve written, so I’m trying ..
I’m trying to run a subprocess where i can run “python -m pdb script.py” and pass in inputs "n, s, l, p" from my main process and read the return lines from pdb. Source: Python..
I’m creating a script that is posting a message to both discord and twitter, depending on some input. I have to methods (in separate .py files), post_to_twitter and post_to_discord. What I want to achieve is that both of these try to execute even if the other fails (e.g. if there is some exception with login). ..
Recent Comments