python-multiprocessing

问题 I have several scripts which I run using Multiprocessing pool I am trying to do a progress bar based on the scripts completed. I checked https://stackoverflow.com/questions/3173320/text-progress-bar-in-the-console#= but I cannot figure out how I can combine the scripts completed in the counter import os from multiprocessing import Pool def run_process(process): os.system('python {}'.format(process)) processes = ('script1.py', 'script2.py','script3.py','script4.py') if __name__ == "__main__":

问题 I have several scripts which I run using Multiprocessing pool I am trying to do a progress bar based on the scripts completed. I checked https://stackoverflow.com/questions/3173320/text-progress-bar-in-the-console#= but I cannot figure out how I can combine the scripts completed in the counter import os from multiprocessing import Pool def run_process(process): os.system('python {}'.format(process)) processes = ('script1.py', 'script2.py','script3.py','script4.py') if __name__ == "__main__":

问题 I am doing some calculations on large collections of bytes. The process runs on chunks of bytes. I am trying to use parallel processing using multiprocessing for performance enhancement. Initially I tried to use pool.map but that only allows single argument, then I found about pool.starmap. But pool.starmap gives results only when all the processes have finished. I want results as they come (sort of). I am trying to use pool.imap which does provide results as processes finish but does not

问题 import asyncio import httpx from datetime import datetime async def request_test(url): async with httpx.AsyncClient() as client: r = await client.get(url, timeout=None, headers=None) return len(r.text) async def main(rest_api_url_list ): futures = [asyncio.ensure_future(request_test(url)) for url in rest_api_url_list ] results = await asyncio.gather(*futures) print(results) print(len(results)) start = datetime.now() rest_api_url_list = [~~~~~~~~~~~~~] # 2000EA loop = asyncio.get_event_loop()

问题 I don't think I encountered this problem working on this in Python 2.7, but while debugging in 3.7, Python throws an exception when pool.close() is called. This is the relevant part of the function: pool = multiprocessing.Pool(6) iterator = pool.imap_unordered(worker_func, worker_input) while True: try: t0, t1 = next(iterator) except multiprocessing.TimeoutError: continue except StopIteration: break else: dbinserts1(t0) dbinserts2(t1) pool.close() pool.join() The only change made by 2to3 was

问题 Basically, I have 2 threads, receive and send. I want to be able to type a message, and whenever I get a new message it just gets 'printed above the line I am typing in'. first what I thought would work, and you can just paste this it will run: import multiprocessing import time from reprint import output import time import random import sys def receiveThread(queue): i = 0 while True: queue.put(i) i+=1 time.sleep(0.5) def sendThread(queue): while True: a = sys.stdin.read(1) if (a != ""):

问题 Basically, I have 2 threads, receive and send. I want to be able to type a message, and whenever I get a new message it just gets 'printed above the line I am typing in'. first what I thought would work, and you can just paste this it will run: import multiprocessing import time from reprint import output import time import random import sys def receiveThread(queue): i = 0 while True: queue.put(i) i+=1 time.sleep(0.5) def sendThread(queue): while True: a = sys.stdin.read(1) if (a != ""):

问题 Basically, I have 2 threads, receive and send. I want to be able to type a message, and whenever I get a new message it just gets 'printed above the line I am typing in'. first what I thought would work, and you can just paste this it will run: import multiprocessing import time from reprint import output import time import random import sys def receiveThread(queue): i = 0 while True: queue.put(i) i+=1 time.sleep(0.5) def sendThread(queue): while True: a = sys.stdin.read(1) if (a != ""):

问题 Basically, I have 2 threads, receive and send. I want to be able to type a message, and whenever I get a new message it just gets 'printed above the line I am typing in'. first what I thought would work, and you can just paste this it will run: import multiprocessing import time from reprint import output import time import random import sys def receiveThread(queue): i = 0 while True: queue.put(i) i+=1 time.sleep(0.5) def sendThread(queue): while True: a = sys.stdin.read(1) if (a != ""):

问题 Basically, I have 2 threads, receive and send. I want to be able to type a message, and whenever I get a new message it just gets 'printed above the line I am typing in'. first what I thought would work, and you can just paste this it will run: import multiprocessing import time from reprint import output import time import random import sys def receiveThread(queue): i = 0 while True: queue.put(i) i+=1 time.sleep(0.5) def sendThread(queue): while True: a = sys.stdin.read(1) if (a != ""):