multithreading

问题 I'm running a flask server that connects to an iOS client with Flask-Socketio. The server has to process some complicated data, and since that takes a while to solve, I do it in a background job using Redis Queue. Communication works fine normally, but I need to emit to the client, and write to database once the job finishes, and I am trying to do that from the job function (if there is a way to let the app know when the job is finished, the app could handle all communication in one place).

问题 I'm running a flask server that connects to an iOS client with Flask-Socketio. The server has to process some complicated data, and since that takes a while to solve, I do it in a background job using Redis Queue. Communication works fine normally, but I need to emit to the client, and write to database once the job finishes, and I am trying to do that from the job function (if there is a way to let the app know when the job is finished, the app could handle all communication in one place).

问题 Dealing with a smart garden setup. I am doing threading with three different functions so that if triggered I can run the lamp/pump/fan for a predetermined time. While threading with lamp and pump there is no problem. But when attempting to thread with Dht22 the program will work for a while and then throw an error of "argument must be an int, or be format of file.no()" I think the problem is due to the array format, but I don't know how to read just the temperature from the dht22 or to make

问题 Dealing with a smart garden setup. I am doing threading with three different functions so that if triggered I can run the lamp/pump/fan for a predetermined time. While threading with lamp and pump there is no problem. But when attempting to thread with Dht22 the program will work for a while and then throw an error of "argument must be an int, or be format of file.no()" I think the problem is due to the array format, but I don't know how to read just the temperature from the dht22 or to make

问题 Dealing with a smart garden setup. I am doing threading with three different functions so that if triggered I can run the lamp/pump/fan for a predetermined time. While threading with lamp and pump there is no problem. But when attempting to thread with Dht22 the program will work for a while and then throw an error of "argument must be an int, or be format of file.no()" I think the problem is due to the array format, but I don't know how to read just the temperature from the dht22 or to make

问题 I have a class with the following method: def get_add_new_links(self, max_num_links): self.get_links_m2(max_num_links) processes = mp.cpu_count() pool = mp.Pool(processes=processes) func = partial(worker, self) with open(os.path.join(self.report_path, "links.txt"), "r") as f: reports = pool.map(func, f.readlines()) pool.close() pool.join() where get_links_m2 is another method that creates the file "links.txt". The worker is: def worker(obje, link): doc, rep = obje.get_info_m2(link) obje.add

问题 i'm trying to create a simple program using python socket and threading library. I would like to automatize the following procedure using a decorator: t = threading.Thread(target=function, args=(arg1, arg2)) t.start() the program is structured using OOP so I defined a subclass inside the main one to contain all the decorators (I've read about this method in this article: https://medium.com/@vadimpushtaev/decorator-inside-python-class-1e74d23107f6). Therefore I have a situation like this:

问题 Is it necessary for a thread in java to be in ready state before it gets interrupted by interrupt method? I tried to check this by typing the above given code below. class MyThread extends Thread { public void run() { try { for(int i =0;i<10;i++) { System.out.println("I am lazy thread"); Thread.sleep(2000); } } catch(InterruptedException e) { System.out.println("I got interrupted"); } } } public class SleepAndInterruptDemonstrationByDurga { public static void main(String[] args) { MyThread t=

问题 Is it necessary for a thread in java to be in ready state before it gets interrupted by interrupt method? I tried to check this by typing the above given code below. class MyThread extends Thread { public void run() { try { for(int i =0;i<10;i++) { System.out.println("I am lazy thread"); Thread.sleep(2000); } } catch(InterruptedException e) { System.out.println("I got interrupted"); } } } public class SleepAndInterruptDemonstrationByDurga { public static void main(String[] args) { MyThread t=

问题 All the answers I was able to find so far suggest calling omp_set_num_threads . While it's a proper answer for most cases, it doesn't work for me. Internally, calling omp_set_num_threads causes a creation of per-thread ICV (or modification, if current thread already has one), and the number of threads is stored there. This means that if there is a different thread, that starts a parallel region, it won't see our new value. So calling omp_set_num_threads != setting OMP_NUM_THREADS env variable