python之如何使用 pywin32 和 WMI 设置进程优先级

from win32com.client import GetObject 
 
for proc in GetObject("WinMgmts:{impersonationLevel=impersonate,(IncreaseBasePriority,Debug)}").InstancesOf("Win32_Process"): 
  if proc.CommandLine == "<my-command-line>": 
    proc.SetPriority(4) # fails 

我已尝试传递一个优先级 (0x40) 以及一个实际优先级 (4)，但都失败并显示以下消息:

  File "test.py", line 5, in <module> 
    proc.SetPriority(0x40) 
  File "C:\Progs\Python26\lib\site-packages\win32com\client\dynamic.py", line 505, in __getattr__ 
    ret = self._oleobj_.Invoke(retEntry.dispid,0,invoke_type,1) 
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, u'SWbemObjectEx', u'Invalid parameter ', None, 0, -2147217400), None) 

我可以看出它不喜欢某些参数，但为什么不呢？

我对使用 SetPriorityClass 的非 WMI 解决方案不感兴趣。我给了自己 SeDebugPrivilege 如下:

import win32security, ntsecuritycon, win32con, win32api 
privs = ((win32security.LookupPrivilegeValue('',ntsecuritycon.SE_DEBUG_NAME), win32con.SE_PRIVILEGE_ENABLED),) 
hToken = win32security.OpenProcessToken(win32api.GetCurrentProcess(), win32security.TOKEN_ALL_ACCESS) 
win32security.AdjustTokenPrivileges(hToken, False, privs) 
win32api.CloseHandle(hToken) 

请您参考如下方法:

我在玩“GetOwner”时遇到了同样的问题。

刚试过这个，灵感来自 WMI:

# using proc as in your code 
 
# this line seems to provide the dispatch interface on the COM object 
disp = Dispatch(proc) 
 
# this one gets the method definition 
method = disp.Methods_('SetPriority') 
 
# the input parameters, and their description 
in_parameters = method.InParameters 
in_parameter_names = [(i.Name, i.IsArray) for i in in_parameters.Properties_] \ 
  if not in_parameters is None else [] # not needed here 
# >> print in_parameter_names 
# [(u'Priority', False)] 
 
# the priority parameter, and setting its value 
in_parameters.Properties_['Priority'].Value = 0x40 
 
# doing the call 
return_values = disp.ExecMethod_ (method.Name, in_parameters) 

对于您的示例，可以跳过以下内容。要解析返回值，只需执行与输入相同的操作:

out_parameters = method.OutParameters 
out_parameter_names = [(i.Name, i.IsArray) for i in out_parameters.Properties_] \ 
  if not out_parameters is None else [] 
res = [return_values.Properties_(i[0]).Value for i in out_parameter_names]