使用python检查注册表项是否存在

Question

我正在寻找一种方法来检查 python 中是否存在注册表项。

我该如何执行此操作或需要什么代码来检查注册表项是否存在？

Answer 1

在之前的答案中似乎是一些信息这里

您是否检查其存在，因为您希望您的程序读取它？要检查是否存在密钥，您可以将其包装在try-except块中。这将防止“竞争条件”试图阅读密钥，在（不太可能）的事件中，它在检查其存在和实际读取密钥之间进行了修改。类似：

from _winreg import *

key_to_read = r'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall'

try:
    reg = ConnectRegistry(None, HKEY_LOCAL_MACHINE)
    k = OpenKey(reg, key_to_read)

    # do things with the key here ...

except:
    # do things to handle the exception here

.

Answer 2

这是一篇较旧的文章，但经过一些类似的搜索后，我觉得我应该向其中添加一些信息。 winreg ，据我所知，仅适用于 Windows 环境。 python 注册表 经过 威利巴伦辛 可以用于跨平台执行此操作，并且在使用注册表时有许多不错的选项。

如果您的目标键包含要提取的值，您可以按照以下步骤列出它们......首先，导入模块（pip install python-registry）。这可能不起作用，因为主文件夹被插入到 libs/sitepackages 中，请确保 登记处 文件夹位于站点包的根目录下。

from Registry import Registry         # Ensure Registry is in your libs/site-packages

接下来创建您的函数并确保添加 try: 和 except进入你的函数来检查它是否存在。

# Store internal Registry paths as variable, may make it easier, remove repeating yourself
time_zone = "ControlSet001\\Control\\TimeZoneInformation"

# STORE the path to your files if you plan on repeating this process.
<Path_To_reg_hive> = "C:\\Users\\Desktop\\Whatever_Folder\\SYSTEM"

def get_data():
    registry = Registry.Registry(<Path_To_reg_hive>)  # Explicitly, or use variable above
    try:
        key = registry.open(time_zone)  # Registry.Registry opens reg file, goes to the path (time_zone)
    except Registry.RegistryKeyNotFoundException:  # This error occurs if Path is not present
        print("Sorry Bud, no key values found at : " + time_zone)  # If not there, print a response

您可以对要检查的所有内容创建一个字典，然后通过此过程迭代它以一次检查多个，或一次仅检查一个。这是一个工作示例：

from Registry import Registry

# These can be included directly into the function, or separated if you have several
system = "SYSTEM"   # or a Path, I have a SYSTEM hive file in my working environment folder
time_zone = "ControlSet001\\Control\\TimeZoneInformation123" # Path you want to check, added 123 so its not there

def get_data():
    registry = Registry.Registry(system)   # Explicitly, or use variable above
    try:
        key = registry.open(time_zone)       # Registry.Registry opens reg file, goes to the path (time_zone)
    except Registry.RegistryKeyNotFoundException:  # This error occurs if Path is not present
        print("Sorry Bud, no key values found at : " + time_zone)  # If not there, print a response

# key is identified above only to use later, such as....   for v in key.subkeys():    Do more stuff
get_data()

返回，

Sorry Bud, no key values found at : ControlSet001\Control\TimeZoneInformation123