Python线程池实现原理与代码示例

温以宁

发布时间：2026-10-12| 3人浏览过

原创

本文介绍Python中线程池的实现方法，通过建立任务队列并加锁，使多个线程从队列中取出任务执行。提供基于Python2.6的thrd_pool.py代码示例及运行结果，展示线程复用机制，适用于需要并发处理任务的场景。

本文介绍Python中线程池的具体实现方式，供读者参考学习。

核心原理是构建一个任务队列，多个线程从该队列中获取任务并执行。为确保线程安全，任务队列需进行加锁处理，具体实现可参考后续代码。

代码文件名为thrd_pool.py，测试环境为Ubuntu Linux系统及Python2.6版本。

import threading
import time
import signal
import os
class task_info(object):
  def __init__(self):
    self.func = None
    self.parm0 = None
    self.parm1 = None
    self.parm2 = None
class task_list(object):
  def __init__(self):
    self.tl = []
    self.mutex = threading.Lock()
    self.sem = threading.Semaphore(0)
  def append(self, ti):
    self.mutex.acquire()
    self.tl.append(ti)
    self.mutex.release()
    self.sem.release()
  def fetch(self):
    self.sem.acquire()
    self.mutex.acquire()
    ti = self.tl.pop(0)    
    self.mutex.release()
    return ti
class thrd(threading.Thread):
  def __init__(self, tl):
    threading.Thread.__init__(self)
    self.tl = tl
  def run(self):
    while True:
      tsk = self.tl.fetch()
      tsk.func(tsk.parm0, tsk.parm1, tsk.parm2)  
class thrd_pool(object):
  def __init__(self, thd_count, tl):
    self.thds = []
    for i in range(thd_count):
      self.thds.append(thrd(tl))
  def run(self):
    for thd in self.thds:
      thd.start()
def func(parm0=None, parm1=None, parm2=None):
  print 'count:%s, thrd_name:%s'%(str(parm0), threading.currentThread().getName())
def cleanup(signo, stkframe):
  print ('Oops! Got signal %s', signo)  
  os._exit(0)
if __name__ == '__main__':
  signal.signal(signal.SIGINT, cleanup)
  signal.signal(signal.SIGQUIT, cleanup)
  signal.signal(signal.SIGTERM, cleanup)
  tl = task_list()
  tp = thrd_pool(6, tl)
  tp.run()
  count = 0
  while True:
    ti = task_info()
    ti.parm0 = count
    ti.func = func
    tl.append(ti)
    count += 1
    time.sleep(2)
  pass

运行该脚本的命令为：python thrd_pool.py

程序运行输出结果如下所示。

count:0, thrd_name:Thread-1
count:1, thrd_name:Thread-2
count:2, thrd_name:Thread-3
count:3, thrd_name:Thread-4
count:4, thrd_name:Thread-5
count:5, thrd_name:Thread-1
count:6, thrd_name:Thread-6
count:7, thrd_name:Thread-2
count:8, thrd_name:Thread-3
count:9, thrd_name:Thread-4
count:10, thrd_name:Thread-5
count:11, thrd_name:Thread-1
count:12, thrd_name:Thread-6
count:13, thrd_name:Thread-2
count:14, thrd_name:Thread-3
('Oops! Got signal %s', 15)

希望上述内容对您的Python编程实践有所帮助。