11/20/2023 0 Comments Python queue thread![]() ![]() NOTE : I know sue of global is not recommended. Output: C:\Users\dinesh\Desktop>python demo.py In this tutorial you will discover how to use queue task done and join in Python. T = threading.Thread(name=name,target=reader) Apby Jason Brownlee in Threading You can mark queue tasks done via taskdone () and be notified when all tasks are done via join (). The problem is that Python is waiting for our thread to return. from the queue a thread waiting to put is notified then. The thread puts something on the queue, and then an after callback gets it from the. #Read data from file and put it into list try: import threading except ImportError: import dummythreading as threading. #Once data is not present, let's print exception message The multiprocessing package offers both local and remote concurrency, effectively side-stepping the Global Interpreter Lock by using subprocesses instead of threads. Print threading.currentThread().getName() + " - " import queue import threading import time fifoqueue queue.Queue () def hd (): print ('hi') time.sleep (1) print ('done') for i in range (3): cc threading.Thread (targethd) fifoqueue.put (cc) cc.start () Current Output hi hi hi donedonedone Expected Output hi done hi done hi done python python-3. multiprocessing is a package that supports spawning processes using an API similar to the threading module. #Global variable list for reading file data Once, all the data is printed and still thread trying to read, we will add the exception.Also, it will remove that printed line from list. Now, every thread will read one line from list and print it.So, instead of opening file in every thread and read it, we will open file one time and put data in list. To get an item from the queue, you can use the get () method: item queue. You want to read each line of file in new thread. ![]() In your case, every thread is reading all messages because target function " job" is opening file and reading all the data and every thread is calling that target function. Let me answer regarding multi-threading only. Your trying too many things to learn in same code snippet like 1) Multi-Threading 2) Queue Data Structure 3) Thread Synchronization Mechanisms 4) Locking etc. ![]()
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