python 多线程串行和并行的实例


Posted in Python onFebruary 22, 2019

如下所示:

#coding=utf-8
import threading
import time
import cx_Oracle
from pprint import pprint
import csv
table_name = "dbtest.csv"
f = open(table_name + ".csv", "w")
 
def exp01():
  conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
  cursor = conn.cursor()
  owner = "system"
  writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
  tname = threading.current_thread()
  print tname
  exportOracleSql = "select 'exp01' from dual"
  print exportOracleSql
  x = cursor.execute(exportOracleSql)
  time.sleep(1000)
  cursor.close()
  conn.close()
 
def exp02():
  conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
  cursor = conn.cursor()
  owner = "system"
  writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
  tname = threading.current_thread()
  print tname
  exportOracleSql = "select 'exp02' from dual"
  print exportOracleSql
  x = cursor.execute(exportOracleSql)
  time.sleep(1000)
  cursor.close()
  conn.close()
 
 
def exp03():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp03' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp04():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp04' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp05():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp05' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp06():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp06' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp07():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp07' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp08():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp08' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp09():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp09' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp10():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp10' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp11():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp11' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp12():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp12' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp13():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp13' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp14():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp14' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
threads = []
t1 = threading.Thread(target=exp01,name='exp01')
threads.append(t1)
t2 = threading.Thread(target=exp02,name='exp02')
threads.append(t2)
t2 = threading.Thread(target=exp03,name='exp03')
threads.append(t2)
t2 = threading.Thread(target=exp04,name='exp04')
threads.append(t2)
t2 = threading.Thread(target=exp05,name='exp05')
threads.append(t2)
t2 = threading.Thread(target=exp06,name='exp06')
threads.append(t2)
t2 = threading.Thread(target=exp07,name='exp07')
threads.append(t2)
t2 = threading.Thread(target=exp08,name='exp08')
threads.append(t2)
t2 = threading.Thread(target=exp09,name='exp09')
threads.append(t2)
t2 = threading.Thread(target=exp10,name='exp10')
threads.append(t2)
t2 = threading.Thread(target=exp11,name='exp11')
threads.append(t2)
t2 = threading.Thread(target=exp12,name='exp12')
threads.append(t2)
t2 = threading.Thread(target=exp13,name='exp13')
threads.append(t2)
t2 = threading.Thread(target=exp14,name='exp14')
threads.append(t2)
 
if __name__ == '__main__':
  for t in threads:
    #t.setDaemon(True)
    t.start()
    #t.run()
    #t.start()
    # print '3333333'
    print threading.current_thread()
    # print t.is_alive()
    # print '3333333'
  t.join()
  print "all over "
 
 
输出:
C:\Python27\python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/thread/p7.py
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<Thread(exp01, started 155004)>
select 'exp01' from dual
<Thread(exp12, started 155744)>
 select 'exp12' from dual<Thread(exp02, started 155000)>
 
select 'exp02' from dual
<Thread(exp08, started 155728)>
select 'exp08' from dual
<Thread(exp06, started 155752)>
select 'exp06' from dual
<Thread(exp03, started 154816)>
select 'exp03' from dual
<Thread(exp09, started 156544)>
select 'exp09' from dual
<Thread(exp11, started 155760)>
select 'exp11' from dual
<Thread(exp04, started 154112)>
select 'exp04' from dual
<Thread(exp10, started 155764)><Thread(exp05, started 154640)>
 
select 'exp10' from dualselect 'exp05' from dual
 
<Thread(exp07, started 155188)>
select 'exp07' from dual
<Thread(exp13, started 154600)>
select 'exp13' from dual
<Thread(exp14, started 155804)>
select 'exp14' from dual
 
 
  	SID	SERIAL#	USERNAME	PREV_SQL_ID
1	9	1179	TEST	01tjnxmmurdw7
2	10	75	TEST	g5ph474nsjvwv
3	12	907	TEST	87mdhpgj9k5tz
4	419	1303	TEST	4g8r4bkf8aq3n
5	420	655	TEST	1rx9mjdvp1udx
6	421	1955	TEST	928r7khrtn4jd
7	424	51	TEST	d6sgjjwpm74qz
8	839	3	TEST	a1hg7hrwgrdqk
9	840	43	TEST	fqjuj4qp5hmf0
10	841	111	TEST	2jzx0889h3k5n
11	1252	145	TEST	awtzfbx7dhn88
12	1253	7	TEST	55tzs9gdmcd4p
13	1254	9	TEST	4v01fvb5sj7k4
14	1255	265	TEST	39bcsfjr5y62b
 
 
此时是并发执行
 
 
 
改变join的位置:
#coding=utf-8
import threading
import time
import cx_Oracle
from pprint import pprint
import csv
table_name = "dbtest.csv"
f = open(table_name + ".csv", "w")
 
def exp01():
  conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
  cursor = conn.cursor()
  owner = "system"
  writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
  tname = threading.current_thread()
  print tname
  exportOracleSql = "select 'exp01' from dual"
  print exportOracleSql
  x = cursor.execute(exportOracleSql)
  time.sleep(1000)
  cursor.close()
  conn.close()
 
def exp02():
  conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
  cursor = conn.cursor()
  owner = "system"
  writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
  tname = threading.current_thread()
  print tname
  exportOracleSql = "select 'exp02' from dual"
  print exportOracleSql
  x = cursor.execute(exportOracleSql)
  time.sleep(1000)
  cursor.close()
  conn.close()
 
 
def exp03():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp03' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp04():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp04' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp05():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp05' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp06():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp06' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp07():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp07' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp08():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp08' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp09():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp09' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp10():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp10' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp11():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp11' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp12():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp12' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp13():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp13' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
def exp14():
    conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
    cursor = conn.cursor()
    owner = "system"
    writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
    tname = threading.current_thread()
    print tname
    exportOracleSql = "select 'exp14' from dual"
    print exportOracleSql
    x = cursor.execute(exportOracleSql)
    time.sleep(1000)
    cursor.close()
    conn.close()
 
threads = []
t1 = threading.Thread(target=exp01,name='exp01')
threads.append(t1)
t2 = threading.Thread(target=exp02,name='exp02')
threads.append(t2)
t2 = threading.Thread(target=exp03,name='exp03')
threads.append(t2)
t2 = threading.Thread(target=exp04,name='exp04')
threads.append(t2)
t2 = threading.Thread(target=exp05,name='exp05')
threads.append(t2)
t2 = threading.Thread(target=exp06,name='exp06')
threads.append(t2)
t2 = threading.Thread(target=exp07,name='exp07')
threads.append(t2)
t2 = threading.Thread(target=exp08,name='exp08')
threads.append(t2)
t2 = threading.Thread(target=exp09,name='exp09')
threads.append(t2)
t2 = threading.Thread(target=exp10,name='exp10')
threads.append(t2)
t2 = threading.Thread(target=exp11,name='exp11')
threads.append(t2)
t2 = threading.Thread(target=exp12,name='exp12')
threads.append(t2)
t2 = threading.Thread(target=exp13,name='exp13')
threads.append(t2)
t2 = threading.Thread(target=exp14,name='exp14')
threads.append(t2)
 
if __name__ == '__main__':
  for t in threads:
    #t.setDaemon(True)
    t.start()
    #t.run()
    #t.start()
    # print '3333333'
    print threading.current_thread()
    # print t.is_alive()
    # print '3333333'
    t.join()
  print "all over "
 
 
 
C:\Python27\python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/thread/p7.py
<_MainThread(MainThread, started 154776)>
<Thread(exp01, started 156240)>
select 'exp01' from dual
 
 
此时变成串行,数据库连接也只有一个:
 
  	SID	SERIAL#	USERNAME	PREV_SQL_ID
1	421	1957	TEST	928r7khrtn4jd

以上这篇python 多线程串行和并行的实例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持三水点靠木。

Python 相关文章推荐
浅析Python中的for 循环
Jun 09 Python
python下载图片实现方法(超简单)
Jul 21 Python
Python跨文件全局变量的实现方法示例
Dec 10 Python
python3+PyQt5+Qt Designer实现堆叠窗口部件
Apr 20 Python
python requests 测试代理ip是否生效
Jul 25 Python
Python异常的检测和处理方法
Oct 26 Python
树莓派使用USB摄像头和motion实现监控
Jun 22 Python
详解Django CAS 解决方案
Oct 30 Python
Python彻底删除文件夹及其子文件方式
Dec 23 Python
python 使用while循环输出*组成的菱形实例
Apr 12 Python
带你学习Python如何实现回归树模型
Jul 16 Python
matplotlib 画双轴子图无法显示x轴的解决方法
Jul 27 Python
Python OOP类中的几种函数或方法总结
Feb 22 #Python
VSCode Python开发环境配置的详细步骤
Feb 22 #Python
python中logging模块的一些简单用法的使用
Feb 22 #Python
Python 限制线程的最大数量的方法(Semaphore)
Feb 22 #Python
Python3.6.x中内置函数总结及讲解
Feb 22 #Python
python自定义线程池控制线程数量的示例
Feb 22 #Python
Python实现多进程的四种方式
Feb 22 #Python
You might like
织梦模板标记简介
2007/03/11 PHP
微信随机生成红包金额算法php版
2016/07/21 PHP
php生成毫秒时间戳的实例讲解
2017/09/22 PHP
Div Select挡住的解决办法
2008/08/07 Javascript
用nodejs访问ActiveX对象,以操作Access数据库为例。
2011/12/15 NodeJs
用JSON做数据传输格式中的一些问题总结
2011/12/21 Javascript
仿谷歌主页js动画效果实现代码
2013/07/14 Javascript
关于jquery中全局函数each使用介绍
2013/12/10 Javascript
jquery五角星评分插件示例分享
2014/02/21 Javascript
Javascript 函数parseInt()转换时出现bug问题
2014/05/20 Javascript
checkbox勾选判断代码分析
2014/06/11 Javascript
javascript运动详解
2015/07/06 Javascript
JS实现弹性漂浮效果的广告代码
2015/09/02 Javascript
jQuery实现仿美橙互联两级导航菜单效果完整实例
2015/09/17 Javascript
jQuery基于cookie实现的购物车实例分析
2015/12/24 Javascript
AngularJs  E2E Testing 详解
2016/09/02 Javascript
Vue from-validate 表单验证的示例代码
2017/09/26 Javascript
Angular 4根据组件名称动态创建出组件的方法教程
2017/11/01 Javascript
JavaScript类数组对象转换为数组对象的方法实例分析
2018/07/24 Javascript
基于vue开发微信小程序mpvue-docs跳转页面功能
2019/04/10 Javascript
js实现弹幕飞机效果
2020/08/27 Javascript
[02:01]大师之路——DOTA2完美大师赛11月论剑上海
2017/11/06 DOTA
[55:26]DOTA2-DPC中国联赛 正赛 Aster vs LBZS BO3 第一场 2月23日
2021/03/11 DOTA
Python中内建函数的简单用法说明
2016/05/05 Python
浅谈用Python实现一个大数据搜索引擎
2017/11/28 Python
Python中的pygal安装和绘制直方图代码分享
2017/12/08 Python
Selenium鼠标与键盘事件常用操作方法示例
2018/08/13 Python
python获取时间及时间格式转换问题实例代码详解
2018/12/06 Python
python write无法写入文件的解决方法
2019/01/23 Python
通过PHP与Python代码对比的语法差异详解
2019/07/10 Python
Python使用文件操作实现一个XX信息管理系统的示例
2020/07/02 Python
详解使用CSS3的@media来编写响应式的页面
2017/11/01 HTML / CSS
美工的岗位职责
2013/11/14 职场文书
活动倡议书范文
2014/05/13 职场文书
经济管理专业求职信
2014/06/09 职场文书
学校捐书倡议书
2015/04/27 职场文书