python multi process multi thread
muti thread:
python threading:
https://docs.python.org/2/library/threading.html#thread-objects
https://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/001386832360548a6491f20c62d427287739fcfa5d5be1f000
http://ebyerly.com/python-threading-examples.html
recommend to use coroutine+muti process to replace muti thread in python
https://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/0013868328689835ecd883d910145dfa8227b539725e5ed000
basic:
import time, threading # 新线程执行的代码:
def loop():
print 'thread %s is running...' % threading.current_thread().name
n =
while n < :
n = n +
print 'thread %s >>> %s' % (threading.current_thread().name, n)
time.sleep()
print 'thread %s ended.' % threading.current_thread().name print 'thread %s is running...' % threading.current_thread().name
t = threading.Thread(target=loop, name='LoopThread')
t.start()
t.join()
print 'thread %s ended.' % threading.current_thread().name
lock:
balance =
lock = threading.Lock() def run_thread(n):
for i in range():
# 先要获取锁:
lock.acquire()
try:
# 放心地改吧:
change_it(n)
finally:
# 改完了一定要释放锁:
lock.release()
arugments:
import threading def some_func(one, two, an_arg = ):
return one + two * an_arg eg = threading.Thread(target=some_func,
args = (, ),
kwargs = {"an_arg": })
python multi process multi thread的更多相关文章
- python learning Process and Thread.py
# 多进程 # Windows下面没有fork ,请在linux下跑下面的代码 import os print('Process (%s) start...' % os.getpid()) pid = ...
- Linux process vs thread
Linux process vs thread Question I have a query related to the implementation of threads in Linux. L ...
- Linux Process VS Thread VS LWP
Process program program==code+data; 一个进程可以对应多个程序,一个程序也可以变成多个进程.程序可以作为一种软件资源长期保存,以文件的形式存放在硬盘 process: ...
- process vs thread
process vs thread http://blog.csdn.net/mishifangxiangdefeng/article/details/7588727 6.进程与线程的区别:系统调度是 ...
- Activity, Service,Task, Process and Thread之间的关系
Activity, Service,Task, Process and Thread之间到底是什么关系呢? 首先我们来看下Task的定义,Google是这样定义Task的:a task is what ...
- kafka.common.KafkaException: Failed to acquire lock on file .lock in /tmp/kafka-logs. A Kafka instance in another process or thread is using this directory.
1.刚才未启动zookeeper集群的时候,直接启动kafka脚本程序,kafka报错了,但是进程号启动起来来,再次启动出现如下所示的问题,这里先将进程号杀死,再启动脚本程序. [hadoop@sla ...
- Failed to acquire lock on file .lock in /tmp/kafka-logs. A Kafka instance in another process or thread is using this directory.
1. 问题现象 启动 kafka 时报错:Failed to acquire lock on file .lock in /tmp/kafka-logs. A Kafka instance in an ...
- yum安装提示错误Thread/process failed: Thread died in Berkeley DB library
问题描述: yum 安装更新提示 rpmdb: Thread/process failed: Thread died in Berkeley DB library 问题解决: 01.删除yum临时库文 ...
- 多线程在python中的使用 thread
近期想学习研究一下python中使用多线程,来提高python在爬虫项目中的效率. 如今我们在网页上查询到在python中使用的多线程的使用大多数都是使用的threading模块,可是python中另 ...
随机推荐
- spring的数据源
Spring提供了两个这样的数据源(都位于org.springframework.jdbc.datasource程序包里): DriverManagerDataSource:在每个连接请 ...
- vim -- 查找和替换
%s/foo/bar/g 在所有行中寻找‘foo’,并且用‘bar’替换 :s/foo/bar/g 在当前行寻找‘foo’,并且用‘foo’替换 :%s/foo/bar/gc 将每一个‘foo',并用 ...
- mysql—Access denied for user 'root'@'localhost' (using password:NO)
安装mysql未设置初始密码,登录提示Access denied for user 'root'@'localhost' (using password:NO): 解决方案: sudo /etc/i ...
- python之函数cmp
cpm函数是内置函数.可直接调用. cmp(x,y) 函数用于比较2个对象,如果 x < y 返回 -1, 如果 x == y 返回 0, 如果 x > y 返回 1. 但是,sorted ...
- Apple设备中point,磅(pt),pixel的关系与转换,以及iPhone模拟器与真机的长度关系
查阅了好多资料都没有发现有相关的详细介绍,包括苹果官方文档,也是草草带过.后来是在一个介绍Macbook打印字体的博客中看到的,受到启发. 首先说明苹果设备绘图的长度单位可以认为是point,不是磅( ...
- Windows Server2008R2中导入Excel
使用Microsoft.ACE.OLEDB对Excel进行操作: string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;" + & ...
- 【vijos】1769 网络的关键边(割边)
https://vijos.org/p/1769 啊,割边写挫了害得我交了那么多发... 本题多想想就出来了.. 首先求出割边,显然关键边就在割边上. 求完割边后,我们先从一个点dfs,维护A的点数和 ...
- 为什么需要标准IO缓冲?
(转)标准I/O缓冲:全缓冲.行缓冲.无缓冲 标准I/O库提供缓冲的目的是尽可能地减少使用read和write调用的次数.它也对每个I/O流自动地进行缓冲管理,从而避免了应用程序需要考虑这一点所带来的 ...
- java Thread方法解析: sleep join wait notify notifyAll
转载自: sleep(),yield(),wait()区别详解:http://dylanxu.iteye.com/blog/1322066 join方法详解:http://www.open-open. ...
- JavaScript 严格模式(use strict)
前言: "use strict" 指令在 JavaScript 1.8.5 (ECMAScript5) 中新增. 它不是一条语句,但是是一个字面量表达式,在 JavaScript ...