注意:Barrier 是 PYTHON3 才有的功能,在 2 中无法测试。
- # ! /usr/bin / env python# - *-coding: utf - 8 - *-import multiprocessing from multiprocessing import Barrier,
- Lock,
- Process from time import time from datetime import datetime def test_with_barrier(synchronizer, seializer) : name = multiprocessing.current_process().name synchronizer.wait() now = time() with serializer: print("process %s -----> %s" % (name, datetime.fromtimestamp(now))) def test_without_barrier() : name = multiprocessing.current_process().name now = time() print("process %s -----> %s" % (name, datetime.fromtimestamp(now))) def worker(dictionary, key, item) : dictionary[key] = item print(key, item) if __name__ == '__main__': synchronizer = Barrier(2) serializer = Lock() Process(name = 'p1 - test_with_barrier', target = test_with_barrier, args = (synchronizer, serializer)).start() Process(name = 'p2 - test_with_barrier', target = test_with_barrier, args = (synchronizer, serializer)).start() Process(name = 'p3 - test_without_barrier', target = test_without_barrier).start() Process(name = 'p4 - test_without_barrier', target = test_without_barrier).start() mgr = multiprocessing.Manager() dictionary = mgr.dict() jobs = [multiprocessing.Process(target = worker, args = (dictionary, i, i * 2)) for i in range(10)]
- for j in jobs: j.start() for j in jobs: j.join()
来源: http://www.bubuko.com/infodetail-1855291.html