How can I abort a task in a multiprocessing.Pool after a timeout?

Question

I am trying to use the multiprocessing package of python in this way:

featureClass = [[1000,k,1] for k in drange(start         


        

Answer 1

we can use gevent.Timeout to set time of worker running . gevent tutorial

from multiprocessing.dummy import Pool 
#you should install gevent.
from gevent import Timeout
from gevent import monkey
monkey.patch_all()
import time

def worker(sleep_time):
    try:

        seconds = 5  # max time the worker may run
        timeout = Timeout(seconds) 
        timeout.start()
        time.sleep(sleep_time)
        print "%s is a early bird"%sleep_time
    except:
        print "%s is late(time out)"%sleep_time

pool = Pool(4)

pool.map(worker, range(10))


output:
0 is a early bird
1 is a early bird
2 is a early bird
3 is a early bird
4 is a early bird
8 is late(time out)
5 is late(time out)
6 is late(time out)
7 is late(time out)
9 is late(time out)