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Python Multithreading no current event loop


Python Multithreading no current event loop

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Python Multithreading no current event loop
Tag : python , By : Ambarish Singh
Date : January 11 2021, 05:14 PM

I wish this helpful for you From a quick search of the error, I found this Github issue that seems to show your problem and its solution.
It looks like you need to use asyncio and, at the beginning of each running thread, call asyncio.set_event_loop(asyncio.new_event_loop()).

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How to schedule an event in python without multithreading?


Tag : python , By : Guyou
Date : March 29 2020, 07:55 AM
should help you out Maybe sched?

Python event loop -- multithreading -- How to run two bits of code simultaneously?


Tag : python , By : algoRhythm99
Date : March 29 2020, 07:55 AM
it should still fix some issue You could read keys in a separate thread or (better) use msvcrt.kbhit() as @martineau suggested:
#!/usr/bin/env python
import msvcrt
from Queue import Empty, Queue
from threading import Thread

def read_keys(queue):
    for key in iter(msvcrt.getch, 'q'): # until `q`
        queue.put(key)
    queue.put(None) # signal the end

q = Queue()
t = Thread(target=read_keys, args=[q])
t.daemon = True # die if the program exits
t.start()

while True:
    try:
        key = q.get_nowait() # doesn't block
    except Empty:
        key = Empty
    else:
        if key is None: # end
            break
    # do stuff

MultiThreading with a python loop


Tag : python , By : Saurabh
Date : March 29 2020, 07:55 AM
This might help you Ok, lets break down your problem.
First of all your main() method processes all the inputs and outputs to a file. When you use main with 2 threads same work is done by both the threads. You need a method that processes only one input and returns output for that input.
def process_x(x):
    #================  Get title ==================#
    out_string = ""
    campaign = parseCampaign(x)
    out_string += ';' + str(campaign.getTitle())

    #================ Get Profile ==================#
    if campaign.getTitle() != 'NA':
        creator = parseCreator(campaign.getCreatorUrl())
        out_string += ';' + str(creator.getCreatorProfileLinkUrl())
    else:
        pass
    #================ Write ==================#
    out_string += '\n'
    return out_string
from threading import Thread
my_list = ['http://stackoverflow.com/', 'http://google.com']
threads = list()
for x in my_list:
    t = Thread(target=process_x, args=(x,))
    t.start()
from multiprocessing import Pool
pool = Pool(processes=4)              # start 4 worker processes
result_list = pool.map(process_x, my_list)
with open('Extract.csv'), 'w') as out_file:
    out_file.writelines(result_list)

RuntimeError: There is no current event loop in thread 'Thread-1' , multithreading and asyncio error


Tag : python , By : lamberms
Date : March 29 2020, 07:55 AM
I hope this helps . New thread doesn't have an event loop so you have to pass and set it explicitly:
def worker(ws, loop):
    asyncio.set_event_loop(loop)
    loop.run_until_complete(ws.start())

if __name__ == '__main__':
    ws = Server()
    loop = asyncio.new_event_loop()
    p = threading.Thread(target=worker, args=(ws, loop,))
    p.start()

Python .NET, multithreading and the windows event loop


Tag : chash , By : user179271
Date : March 29 2020, 07:55 AM
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