How to dispatch WMI methods in python 


Pywin32: A module to support python for Win32 extensions.
Basicly, it could be used to invoke all wmi class to do what you want in Windows.(http://msdn.microsoft.com/en-us/library/windows/desktop/aa394554(v=vs.85).aspx).
We use this module to do network configuration, such as DNS config.
However there is something special when we dispatch WMI methods.

Environment: python2.7, OS:WIN7

To invoke these methods of Win32_NetworkAdapterConfiguration object. Here I didn't use these methods directly, but wrap all input parameters into a SpawnInstance_. It seems wired but worked.

 1 import win32com.client
 2 
 3 objLocator = win32com.client.Dispatch("WbemScripting.SWbemLocator")
 4 objService = objLocator.ConnectServer(".","root\cimv2")
 5 nobj = objService.ExecQuery("Select * from Win32_NetworkAdapterConfiguration Where IPEnabled = True")
 6 obj = nobj[0]##
 7 print obj.IpAddress ## get Ip
 8 
 9 ##To invoke SetWINSServer, you need put all arguments in to a special object.
10 obj_method = obj.Methods_("SetWINSServer")
11 obj_in_param = obj_method.inParameters.SpawnInstance_()
12 obj_in_param.WINSPrimaryServer="127.0.0.1"
13 obj_in_param.WINSSecondaryServer="127.0.0.2"#invoke the SetWINServer method, and it worked.
14 obj.ExecMethod_("SetWINSServer", obj_in_param)

Almost all these methods of Win32_NetworkAdapterConfiguration could be used like this. However, "SetMTU" can't, maybe it's because "this method is not supported", I try it in Windows 2008R2 but get the same error. It said SetMTU is not supported here. http://msdn.microsoft.com/en-us/library/windows/desktop/aa393463(v=vs.85).aspx
posted @ 2013-01-19 10:17  Alex_Waiter  阅读(217)  评论(0)    收藏  举报