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Make sure only a single instance of a program is running
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The following code should do the job, it is cross-platform and runs on Python 2.4-3.2. I tested it on Windows, OS X and Linux.
from tendo import singleton
me = singleton.SingleInstance() # will sys.exit(-1) if other instance is running
The latest code version is avail...
Excluding directories in os.walk
I'm writing a script that descends into a directory tree (using os.walk()) and then visits each file matching a certain file extension. However, since some of the directory trees that my tool will be used on also contain sub directories that in turn contain a LOT of useless (for the purpose of thi...
VSS使用指南 - 开源 & Github - 清泛网 - 专注IT技能提升
...：CD ROM
◆ 显示：VGA或更高级显示器，推荐SuperVGA。
◆ 操作系统：Microsoft Windows 95或以后版本或者MicrosoftWindows NT 4.0，NT要求Service Pack 3或更高版本(包括ServicePack 3)
◆ 外围设备/其它: Microsoft Internet Explorer 4.01 Service Pack1 (包含).
2...
What's Go's equivalent of argv[0]?
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import "os"
os.Args[0] // name of the command that it is running as
os.Args[1] // first command line parameter, ...
Arguments are exposed in the os package http://golang.org/pkg/os/#Variables
If you're going to do argument handlin...
Automatically remove Subversion unversioned files
...ve-unversioned
Before that, I use this python script to do that:
import os
import re
def removeall(path):
if not os.path.isdir(path):
os.remove(path)
return
files=os.listdir(path)
for x in files:
fullpath=os.path.join(path, x)
if os.path.isfile(fullpat...
微软推出Win10物联网版 新系统要“无处不在” - 资讯 - 清泛网 - 专注C/C++及内核技术
...本一起渗透到人们的生活和工作中，成为真正无处不在的操作系统。
今年3月，微软就发布了Win 10的物联网版本，意在使和其他版本一起渗透到人们的生活和工作中，成为真正无处不在的操作系统。
距离Windows 10的家庭版、专业...
Linux btrfs 文件系统不稳定，不能用于生产环境 - 操作系统(内核) - 清泛网...
Linux btrfs 文件系统不稳定，不能用于生产环境经验之谈：Linux btrfs 文件系统不稳定，不能用于生产环境。btrfs文件系统，发展了近20年，但还是不稳定，生产环境不要使用，否则机器重启很可能导致文件系统变成只读了，而且数...
理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
理解和配置 Linux 下的 OOM Killerhow-to-configure-the-linux-oom-killer最近有位 VPS 客户抱怨 MySQL 无缘无故挂掉，还有位客户抱怨 VPS 经常死机，登陆到终端看了一下，都是常见的 Out of memory 问题。这通常是因为某时刻应用程序大量请求 最...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...he tendency to generate noticeably faster code if I optimize for size ( -Os ) instead of speed ( -O2 or -O3 ), and I have been wondering ever since why.
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Installing PG gem on OS X - failure to build native extension
...any others have had problems installing the pg gem. None of the solutions posed for others have worked for me.
15 Answers
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