Jean - 记录成长历程 » python

python时间戳转换

admin — Thu, 29 Apr 2010 14:43:02 +0000

升级某管理程序时使用，解决了时间计算方式不统一的问题

import datetime, time

s= ’201102111747′

a = datetime.datetime(int(s[0:4]),int(s[4:6]),int(s[6:8]),int(s[8:10]),int(s[10:]))

print int(str(time.mktime(a.timetuple()))[:10])

原型

>>> s = datetime.datetime(2009,1,1)
>>> time.mktime(s.timetuple())
1230739200.0

error: command ‘gcc’ failed with exit status 1的解决方法

admin — Sat, 30 Jan 2010 11:10:59 +0000

_mysql.c: In function ‘_mysql_ResultObject_row_tell’:
_mysql.c:2082: error: ‘MYSQL_ROW_OFFSET’ undeclared (first use in this function)
_mysql.c:2082: error: expected ‘;’ before ‘r’
_mysql.c:2084: error: ‘_mysql_ConnectionObject’ has no member named ‘open’
_mysql.c:2085: error: ‘_mysql_ResultObject’ has no member named ‘use’

_mysql.c:2090: error: ‘r’ undeclared (first use in this function)
_mysql.c:2090: error: ‘_mysql_ResultObject’ has no member named ‘result’
_mysql.c:2091: error: ‘_mysql_ResultObject’ has no member named ‘result’
_mysql.c: In function ‘_mysql_ResultObject_dealloc’:
_mysql.c:2099: warning: implicit declaration of function ‘mysql_free_result’
_mysql.c:2099: error: ‘_mysql_ResultObject’ has no member named ‘result’
_mysql.c: At top level:
_mysql.c:2330: error: ‘_mysql_ConnectionObject’ has no member named ‘open’
_mysql.c:2337: error: ‘_mysql_ConnectionObject’ has no member named ‘converter’
_mysql.c:2344: error: ‘_mysql_ConnectionObject’ has no member named ‘connection’
_mysql.c:2351: error: ‘_mysql_ConnectionObject’ has no member named ‘connection’
_mysql.c:2358: error: ‘_mysql_ConnectionObject’ has no member named ‘connection’
_mysql.c:2421: error: ‘_mysql_ResultObject’ has no member named ‘converter’
_mysql.c:2421: error: initializer element is not constant
_mysql.c:2421: error: (near initialization for ‘_mysql_ResultObject_memberlist[0].offset’)
_mysql.c: In function ‘_mysql_ConnectionObject_getattr’:
_mysql.c:2443: error: ‘_mysql_ConnectionObject’ has no member named ‘open’

解决方法：

1.该编译安装mysql 同时修改# vim site.cfg

mysql_config = /path/to/mysql_config

2.使用# yum install MySQL-p*

我的第一个开源项目mailkiller

admin — Sun, 10 Jan 2010 04:15:22 +0000

我刚看python不超过10天，它难免会有BUG。不过在今后的学习当中将继续完善。预计在加入几个实用的功能并提供图形界面。

它能作什么？

读取用户指定的密码文件对邮箱（如yahoo）进行密码检索。
注意：这不是一个对指定用户名进行密码暴力猜解的程序。它通过已存在字典中的用户名和密码对邮箱进行检索。

成功率有多少？

这取决于字典好坏，有一部分人在网络上通通使用固定的密码和用户名

密码文件从哪来？

依靠谱程度分为：1.某网站用户数据库 2.网上搜集 3.有人发布

密码文件的格式是什么样的？

用户名:密码
zeus222:bond007
zgonzo:hy7T90
zhobby:boinger
zhuiyun:nudelamb
ZIADMA:HIZIAD
ziggler:pastword
zimbo11:sesamo
zinky1:939240
zkks2w3:skkd22
zLKxXLn7:2Mqxd47s
zMdFProZDV:58CRd7iwZa
zoe12345:12345zoe
zolushka1:natasha
zontsich:zontsich

怎么用？

[jean@jeantoe mailkiller]$ python mail.killer.py -j yahoo -f 密码文件 -w 检索结果 -s 休眠时间

帮助说明？

[jean@jeantoe mailkiller]$ python mail.killer.py -h
Usage: -j [yahoo,hotmail,gmail] -f [pw file] -w [result file]

Options:
-h, –help show this help message and exit
-j JETTY, –jetty=JETTY
指定要检索的邮箱，目前支持yahoo,hotmail,gmail
-f FILE, –file=FILE username and password file
-w WRITE, –write=WRITE
将检索结果写入到什么位置
-s SLEEP, –sleep=SLEEP
间隔多少秒进行一次登录尝试，短时间内制造大量的登录失败会被封掉ip。默认是15s

在哪能够下载？

svn checkout http://mailkiller.googlecode.com/svn/trunk/

作者主页 : www.zhangyiqun.cn

过滤字符串，小试python速度

admin — Wed, 06 Jan 2010 13:59:54 +0000

测试方法：用python过滤出指定字符串，并和sed与grep执行时间对比

[root@jeantoe MyPy]# cat speed.py
import os, sys

testfile = open(‘/etc/passwd’)
for line in testfile:
if ‘root’ in line:
print line

[root@jeantoe MyPy]# time python speed.py
root:x:0:0:root:/root:/bin/bash

operator:x:11:0:operator:/root:/sbin/nologin

real   0m0.033s
user   0m0.024s
sys   0m0.009s
[root@jeantoe MyPy]# time grep root /etc/passwd
root:x:0:0:root:/root:/bin/bash
operator:x:11:0:operator:/root:/sbin/nologin

real   0m0.003s
user   0m0.000s
sys   0m0.003s
[root@jeantoe MyPy]# time sed -n ‘/root/p’ /etc/passwd
root:x:0:0:root:/root:/bin/bash
operator:x:11:0:operator:/root:/sbin/nologin

real   0m0.003s
user   0m0.001s
sys   0m0.001s

python技巧一则：某些情况下str.join比+=效率高

admin — Mon, 28 Dec 2009 14:51:07 +0000

If s and t are both strings, some Python implementations such as CPython can usually perform an in-place optimization for assignments of the form s = s + t or s += t. When applicable, this optimization makes quadratic run-time much less likely. This optimization is both version and implementation dependent. For performance sensitive code, it is preferable to use the str.join() method which assures consistent linear concatenation performance across versions and implementations.

文中的s和t是什么？

There are six sequence types: strings, Unicode strings, lists, tuples, buffers, and xrange objects.

For other containers see the built in dict and set classes, and the collections module.

代码片段。不言自明。

   for root, dirs, files in os.walk('/media/cdrom0'):
      export+="\n %s;%s;%s" % (root,dirs,files)
   open('TokyoHot1', 'w').write(export)

   for root, dirs, files in os.walk('/media/cdrom0'):
        export.append("\n %s;%s;%s" % (root,dirs,files))
    open('TokyoHot2', 'w').write(''.join(export))