python 多线程

for i in range(begin_number,subject_number):
k=userBegin+i*25  #userBegin=1350
t = threading.Thread(target=genSubejctCookie, args=(keys, k, k+25, i))
t.setDaemon(True)
thread_list.append(t)
for t in thread_list:
t.start()
for t in thread_list:
t.join()