python開啟多個子進程并行運行的方法

from multiprocessing import Process
import sys, os
import time
def timetask(times):
 time.sleep(times)
 print time.localtime()
def works(func, arg, worknum):
 proc_record = []
 for i in range(worknum):
 p = Process(target = func, args = (arg,))
 p.start()
 proc_record.append(p)
 for p in proc_record:
 p.join()
if __name__ == '__main__':
 arg = 5
 procs = 4
 works(timetask, arg, procs)