Event loop refers to an infinite cycle of actions which is used for processing data based on callbacks and messages.
An event loop watches for I/O and timer state changes. It queues functions while waiting for unavailable resources, then dispatches them when resources are available.
Conceptually just having one queue for jobs seems to be sufficient for most use-cases.
What are the reasons for having multiple queues and distinguishing those into "microtasks" and (macro)"tasks"?
I have studied about the event loop in Node.Js, it work in asynchronous and non-blocking manner to process the request. Is there any way so that we can block the execution of event loop?
I am trying to write a web worker that performs an interruptible computation. The only way to do that (other than Worker.terminate()) that I know is to periodically yield to the message loop so it can check if there are any new messages. For example…
I'm working with an asyncio forever() eventloop. Now I want to restart the loop (stop the loop and recreate a new loop) after a process or a signal or a change in a file, but I have some problems to do that:
Here are three simplified code snippets…
What is the best method to have an asyncio event loop run in a Flask app?
My main.py looks like this:
if __name__ == '__main__':
try:
app.run(host='0.0.0.0', port=8000, debug=True)
except:
logging.critical('server: CRASHED:…
The is the simple test code and the result.
import asyncio
async def test():
await asyncio.sleep(1)
if __name__ == '__main__':
asyncio.set_event_loop(None) # Clear the main loop.
loop = asyncio.new_event_loop() # Create a new…
The event loops documentation mentions event_loop_policy but doesn’t describe what it is and why this abstract layer is needed in detail.
(the documentation even says one can customize this layer).
In addition, help(asyncio.get_event_loop_policy())…
Take the following code taken from the nodejs event loop documentation :
// timeout_vs_immediate.js
setTimeout(() => {
console.log('timeout');
}, 0);
setImmediate(() => {
console.log('immediate');
});
According to the documentation :
For…
I am using the following function to force a coroutine to run synchronously:
import asyncio
import inspect
import types
from asyncio import BaseEventLoop
from concurrent import futures
def await_sync(coro: types.CoroutineType, timeout_s:…
I'm using a framework which features auto-connecting to server on page load. I can disable it by passing options arguments, but the line that confuses me is this:
You can prevent this initial socket from connecting automatically by disabling…
I am not sure if the title of my question is formulated correctly, so to explain what I really mean, consider the following example:
I create a QApplication and a QWidget with a QPushButton on it. Then I attach a handler to the click signal from the…
I'm working with both libfuse and the glib event interface and I've run into an issue where I need to run multiple main loops concurrently (glib's g_main_loop_run and fuse_loop_mt).
I've already attempted to created a detached thread for glib's…
Whilst messing around with multithreading, callbacks, win32 api functions, and other troublesome troubles, I received an idea event. (hehehe)
What if, instead of defining a global (or static when designing a class) callback function, I instead…
I've created simple demos, let's get started...
Should to say what we have to use chrome and firefox for comparison
Demo 1:
block.addEventListener("click", () => {
block.style.transform = "translateX(500px)";
block.style.transition = "";
…
