python性能对比之items #1 #-*- coding:utf8-*- import datetime road_nodes = {} for i in range(5000000): road_nodes[i] = {'id':i} beg_time = datetime.datetime.now() for key, val in road_nodes.items(): pass end_time = datetime.datetime.now() print "time_scan:…
原代码如下 from multiprocessing import Process import time import random def task(name): print('%s is running' % name) time.sleep(random.randint(2, 3)) print('%s is finished' % name) if __name__ == '__main__': p = Process(target=task, args=('Subprocess',)…
Scala: /** * Created by sunxu on 2015/9/30. */ import scala.sys.process._ import java.io.File //在相应目录执行shell命令,返回值赋值给变量 val exitValue = Process("hadoop jar pathread-analytics-0.0.1.jar com.duxiu.pathread.stcs.StcsByFieldJob /pathread/2015/10-08 /user…
问题:在Windows写了一python脚本,上传Linux服务器执行,报异常*****^M: bad interpreter: No such file or directory 原因:windows下编写的脚本文件,Linux无法识别格式解决: vi打开脚本 命令模式下,查看文件格式 :set ff? #显示dos 设置文本的模式类型: :set ff=unix 解决. shell脚本亦如此.…
