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()