यह डौग हेलमैन के multiprocessing ActivePool example code (थ्रेडिंग का उपयोग करने के लिए) का मामूली संशोधन है। विचार पूल के सक्रिय सूची के संशोधन का समन्वय करने के एक threading.Lock उपयोग करते हुए, अपने कर्मचारियों, एक पूल में खुद को पंजीकृत खुद को अपंजीकृत जब वे खत्म करने के लिए है:
import threading
import time
import random
class ActivePool(object):
def __init__(self):
super(ActivePool, self).__init__()
self.active=[]
self.lock=threading.Lock()
def makeActive(self, name):
with self.lock:
self.active.append(name)
def makeInactive(self, name):
with self.lock:
self.active.remove(name)
def numActive(self):
with self.lock:
return len(self.active)
def __str__(self):
with self.lock:
return str(self.active)
def worker(pool):
name=threading.current_thread().name
pool.makeActive(name)
print 'Now running: %s' % str(pool)
time.sleep(random.randint(1,3))
pool.makeInactive(name)
if __name__=='__main__':
poolA=ActivePool()
poolB=ActivePool()
jobs=[]
for i in range(5):
jobs.append(
threading.Thread(target=worker, name='A{0}'.format(i),
args=(poolA,)))
jobs.append(
threading.Thread(target=worker, name='B{0}'.format(i),
args=(poolB,)))
for j in jobs:
j.daemon=True
j.start()
while threading.activeCount()>1:
for j in jobs:
j.join(1)
print 'A-threads active: {0}, B-threads active: {1}'.format(
poolA.numActive(),poolB.numActive())
पैदावार
Now running: ['A0']
Now running: ['B0']
Now running: ['A0', 'A1']
Now running: ['B0', 'B1']
Now running: ['A0', 'A1', 'A2']
Now running: ['B0', 'B1', 'B2']
Now running: ['A0', 'A1', 'A2', 'A3']
Now running: ['B0', 'B1', 'B2', 'B3']
Now running: ['A0', 'A1', 'A2', 'A3', 'A4']
Now running: ['B0', 'B1', 'B2', 'B3', 'B4']
A-threads active: 4, B-threads active: 5
A-threads active: 2, B-threads active: 5
A-threads active: 0, B-threads active: 3
A-threads active: 0, B-threads active: 3
A-threads active: 0, B-threads active: 3
A-threads active: 0, B-threads active: 3
A-threads active: 0, B-threads active: 3
A-threads active: 0, B-threads active: 0
A-threads active: 0, B-threads active: 0
A-threads active: 0, B-threads active: 0
कि उपयोगी है, धन्यवाद – m1k3y3