读取注册表的Python代码

Question

from _winreg import *

"""print r"*** Reading from SOFTWARE\Microsoft\Windows\CurrentVersion\Run ***" """
aReg = ConnectRegistry(None,HKEY_LOCAL_MACHINE)

aKey = OpenKey(aReg, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall")
for i in range(1024):
    try:
        asubkey=EnumKey(aKey,i)
        val=QueryValueEx(asubkey, "DisplayName")
        print val
    except EnvironmentError:
        break

有人能纠正这个错误吗…我只想在注册表项HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall的子项中显示“DisplayName” 这就是我得到的错误。。

Traceback (most recent call last):
  File "C:/Python25/ReadRegistry", line 10, in <module>
    val=QueryValueEx(asubkey, "DisplayName")
TypeError: The object is not a PyHKEY object

Answer 1

x64上的x86呢？Use 64-bit Specific Types

如果“Uninstall”中有超过1024个子键怎么办？Use _winreg.QueryInfoKey(key)

Python2:

import errno, os, _winreg
proc_arch = os.environ['PROCESSOR_ARCHITECTURE'].lower()
proc_arch64 = os.environ['PROCESSOR_ARCHITEW6432'].lower()

if proc_arch == 'x86' and not proc_arch64:
    arch_keys = {0}
elif proc_arch == 'x86' or proc_arch == 'amd64':
    arch_keys = {_winreg.KEY_WOW64_32KEY, _winreg.KEY_WOW64_64KEY}
else:
    raise Exception("Unhandled arch: %s" % proc_arch)

for arch_key in arch_keys:
    key = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", 0, _winreg.KEY_READ | arch_key)
    for i in xrange(0, _winreg.QueryInfoKey(key)[0]):
        skey_name = _winreg.EnumKey(key, i)
        skey = _winreg.OpenKey(key, skey_name)
        try:
            print _winreg.QueryValueEx(skey, 'DisplayName')[0]
        except OSError as e:
            if e.errno == errno.ENOENT:
                # DisplayName doesn't exist in this skey
                pass
        finally:
            skey.Close()

Python3:

import errno, os, winreg
proc_arch = os.environ['PROCESSOR_ARCHITECTURE'].lower()
proc_arch64 = os.environ['PROCESSOR_ARCHITEW6432'].lower()

if proc_arch == 'x86' and not proc_arch64:
    arch_keys = {0}
elif proc_arch == 'x86' or proc_arch == 'amd64':
    arch_keys = {winreg.KEY_WOW64_32KEY, winreg.KEY_WOW64_64KEY}
else:
    raise Exception("Unhandled arch: %s" % proc_arch)

for arch_key in arch_keys:
    key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", 0, winreg.KEY_READ | arch_key)
    for i in range(0, winreg.QueryInfoKey(key)[0]):
        skey_name = winreg.EnumKey(key, i)
        skey = winreg.OpenKey(key, skey_name)
        try:
            print(winreg.QueryValueEx(skey, 'DisplayName')[0])
        except OSError as e:
            if e.errno == errno.ENOENT:
                # DisplayName doesn't exist in this skey
                pass
        finally:
            skey.Close()

Answer 2

正如在_winreg.QueryValueEx文档中所说，您需要传递一个已经打开的密钥。EnumKey返回一个字符串，而不是一个打开的键。

aReg = ConnectRegistry(None,HKEY_LOCAL_MACHINE)
aKey = OpenKey(aReg, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall")
for i in range(1024):
    try:
        keyname = EnumKey(aKey, i)
        asubkey = OpenKey(aKey, keyname)
        val = QueryValueEx(asubkey, "DisplayName")
        print val
    except WindowsError:
        break

Answer 3

Documentation表示EnumKey返回带有键名的字符串。必须用_winreg.OpenKey函数显式打开它。我已经修复了您的代码片段：

from _winreg import *

"""print r"*** Reading from SOFTWARE\Microsoft\Windows\CurrentVersion\Run ***" """
aReg = ConnectRegistry(None,HKEY_LOCAL_MACHINE)

aKey = OpenKey(aReg, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall")
for i in range(1024):
    try:
        asubkey_name=EnumKey(aKey,i)
        asubkey=OpenKey(aKey,asubkey_name)
        val=QueryValueEx(asubkey, "DisplayName")
        print val
    except EnvironmentError:
        break

请注意，并非每个键都有“DisplayName”值。