在Python的标准库中，_winreg.pyd可以操作Windows的注册表，另外第三方的win32库封装了大量的Windows API，使用起来也很方便。不过这里介绍的是使用_winreg操作注册表，毕竟是Python自带的标准库，无需安装第三方库。

下面的例子是通过Python获取Windows XP下已经安装的补丁号。Windows的补丁号都在“HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdates”下，通过循环下面所有的目录节点，如果找到的名称符合正则表达式KB(d{6}).*，则表示是一个补丁号。

从例子可以看出操作起来非常的简单和快速。

复制代码 代码如下:

# -*- coding: utf-8 -*-

# 获取Windows的已打的补丁号

from _winreg import *

import re

def subRegKey(key, pattern, patchlist):

# 个数

count = QueryInfoKey(key)[0]

for index in range(count):

# 获取标题

name = EnumKey(key, index)

result = patch.match(name)

if result:

patchlist.append(result.group(1))

sub = OpenKey(key, name)

subRegKey(sub, pattern, patchlist)

CloseKey(sub)

if __name__ == '__main__':

patchlist = []

updates = 'SOFTWAREMicrosoftUpdates'

patch = re.compile('(KBd{6}).*')

key = OpenKey(HKEY_LOCAL_MACHINE, updates)

subRegKey(key, patch, patchlist)

print 'Count: ' + str(len(patchlist))

for p in patchlist:

print p

CloseKey(key)

下面内容转自 Python Standard Library12.13 The _winreg Module

(Windows only, New in 2.0) The _winreg module provides a basic interface to the Windows registry database. Example 12-17 demonstrates the module.

Example 12-17. Using the _winreg Module

File: winreg-example-1.py

复制代码 代码如下:

import _winreg

explorer = _winreg.OpenKey(

_winreg.HKEY_CURRENT_USER,

"SoftwareMicrosoftWindowsCurrentVersionExplorer"

)

#list values owned by this registry key

try:

i = 0

while 1:

name, value, type= _winreg.EnumValue(explorer, i)

print repr(name),

i += 1

except WindowsError:

print

value, type = _winreg.QueryValueEx(explorer, "Logon User Name")

print

print "user is", repr(value)

'Logon User Name' 'CleanShutdown' 'ShellState' 'Shutdown Setting'

'Reason Setting' 'FaultCount' 'FaultTime' 'IconUnderline'...

user is u'Effbot'