当前位置: 移动技术网 > IT编程>脚本编程>Python > python多进程使用及线程池的使用方法代码详解

python多进程使用及线程池的使用方法代码详解

2018年11月05日  | 移动技术网IT编程  | 我要评论

苍井空左脚消失,wow玉猫,在线公司测名

多进程:主要运行multiprocessing模块

import os,time
import sys
from multiprocessing import process
class myprocess(process):
  """docstring for myprocess"""
  def __init__(self, arg, callback):
    super(myprocess, self).__init__()
    self.arg = arg
    self.callback = callback
  def run(self):
    self.callback(self.arg)
def test(arg):
  print("子进程{}开始>>> pid={}".format(arg,os.getpid()))
  for i in range(1,5):
    sys.stdout.write("子进程{}运行中{}\r".format(arg,i))
    sys.stdout.flush()
    time.sleep(1)
def main():
  print("主进程开始>>> pid={}".format(os.getpid()))
  myp=myprocess(1,test)
  myp.start()
  myp2=myprocess(2,test)
  myp2.start()
  myp.join()
  myp2.join()
  print("主进程终止")
if __name__ == '__main__':
  main()

线程池:主要运用了未来模块!下面例子,第一个是正常,第二第线程池,第三个用运行了2个线程池,会排队

from concurrent.futures import threadpoolexecutor
import time
def sayhello(a):
  print("hello: "+a)
  time.sleep(2)
def main():
  seed=["a","b","c"]
  start1=time.time()
  for each in seed:
    sayhello(each)
  end1=time.time()
  print("time1: "+str(end1-start1))
  start2=time.time()
  with threadpoolexecutor(3) as executor:
    for each in seed:
      executor.submit(sayhello,each)
  end2=time.time()
  print("time2: "+str(end2-start2))
  start3=time.time()
  with threadpoolexecutor(2) as executor1:
    executor1.map(sayhello,seed)
  end3=time.time()
  print("time3: "+str(end3-start3))
if __name__ == '__main__':
  main()

总结

以上所述是小编给大家介绍的python多进程使用及线程池的使用方法代码详解,希望对大家有所帮助

如对本文有疑问,请在下面进行留言讨论,广大热心网友会与你互动!! 点击进行留言回复

相关文章:

验证码:
移动技术网