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Python优先队列实现方法示例

yipeiwu_com5年前 (2020-03-06)Python基础

本文实例讲述了Python优先队列实现方法。分享给大家供大家参考，具体如下：

1. 代码

import Queue
import threading
class Job(object):
  def __init__(self, priority, description):
    self.priority = priority
    self.description = description
    print 'New job:', description
    return
  def __cmp__(self, other):
    return cmp(self.priority, other.priority)
q = Queue.PriorityQueue()
q.put(Job(3,'Mid-level job'))
q.put(Job(10,'Low-level job'))
q.put(Job(1,'Important job'))
def process_job(q):
  while True:
    next_job = q.get()
    print 'Processing job:', next_job.description
    q.task_done()
workers = [threading.Thread(target=process_job,args=(q,)),
      threading.Thread(target=process_job,args=(q,)),]
for w in workers:
  w.setDaemon(True)
  w.start()
q.join()

2. 执行结果

New job: Mid-level job
New job: Low-level job
New job: Important job
Processing job: Important job
Processing job: Mid-level job
Processing job: Low-level job

更多关于Python相关内容可查看本站专题：《Python数据结构与算法教程》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》、《Python入门与进阶经典教程》及《Python文件与目录操作技巧汇总》

希望本文所述对大家Python程序设计有所帮助。