Python 中的 WMI 查询问题

Question

我最近一直在编写 Squish 测试脚本，并尝试执行类似于解决方案中描述的操作： Python进程使用的总内存？

我的代码中的相关片段如下：

def measureMemory():
    w = wmi.WMI('.')
    result = w.query("SELECT WorkingSet FROM Win32_PerfRawData_PerfProc_Process WHERE Name=\"some_program\"")
    print result
    for WorkingSet in result:
        print WorkingSet
    subset = result[0]
    print subset['WorkingSet']
    # return result[0]['WorkingSet']

for i in range(50):
    memory = measureMemory()
    if memory:
        # test.passes("%d memory used during undo." % memory)
        print memory

不幸的是，每当我实际尝试运行该东西时，我都会遇到错误，如下所示。

[<_wmi_object: \\USER-PC\root\cimv2:Win32_PerfRawData_PerfProc_Process.Name="some_program">]

instance of Win32_PerfRawData_PerfProc_Process
{
    Name = "some_program";
    WorkingSet = "19386368";
};

Traceback (most recent call last):
  File "C:\Python26\Test scripts\Testify", line 25, in -toplevel-
    memory = measureMemory()
  File "C:\Python26\Test scripts\Testify", line 19, in measureMemory
    print subset['WorkingSet']
  File "C:\Python24\Lib\site-packages\win32com\client\dynamic.py", line 242, in __getitem__
    raise TypeError("This object does not support enumeration")
TypeError: This object does not support enumeration

我不确定为什么这会引发错误，因为我认为我没有对我从中获取代码的示例进行任何重大更改。 我正在使用Python 2.4.4，如果这很重要的话，不幸的是我无法真正升级，无论它有多大帮助。

Answer 1

WMI 语法似乎与示例有所不同。尝试使用subset.WorkingSet而不是subset['WorkingSet']