python自定义线程池控制线程数量的示例

1.自定义线程池

import threading
import queue
import time
 
queue = queue.queue()
 
 
def put_data_in_queue():
  for i in xrange(10):
    queue.put(i)
 
 
class mythread(threading.thread):
  def run(self):
    while not queue.empty():
      sleep_times = queue.get()
      time.sleep(sleep_times)
      queue.task_done()
 
 
def main_function():
  threads_num = 6
  while true:
    put_data_in_queue()
    for i in xrange(threads_num):
      mythread = mythread()
      mythread.setdaemon(true)
      mythread.start()
    queue.join()
    time.sleep(60)

2.多线程与signal信号的监控结合

import threading
import queue
import time
import signal
 
queue = queue.queue()
stop = false
 
 
def receive_signal(signum, stack):
  signal.signal(signal.sigterm, original_sigterm)
  global stop
  stop = true
 
 
def put_data_in_queue():
  for i in xrange(10):
    queue.put(i)
 
 
class mythread(threading.thread):
  def run(self):
    while not queue.empty():
      sleep_times = queue.get()
      time.sleep(sleep_times)
      queue.task_done()
 
 
def main_function():
  threads_num = 6
  while not stop:
    put_data_in_queue()
    for i in xrange(threads_num):
      mythread = mythread()
      mythread.setdaemon(true)
      mythread.start()
    queue.join()
    time.sleep(60)
 
 
if __name__ == "__main__":
  original_sigterm = signal.getsignal(signal.sigterm)
  signal.signal(signal.sigterm, receive_signal)
  main_function()

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