[这是我的第一篇SO文章,但是多年来,很多Google搜索使我来到了这里。
我正在尝试使用一组称为Windows Management Instrumentation(WMI)的工具检测笔记本电脑上的亮度变化,尤其是一个名为WmiMonitorBrightnessEvent的事件类和一个watch_for侦听器。后者的用法描述如下:
http://timgolden.me.uk/python/wmi/wmi.html#wmi._wmi_namespace.watch_for
c = wmi.WMI ()
watcher = c.watch_for (
notification_type="Creation",
wmi_class="Win32_Process",
delay_secs=2,
Name='calc.exe'
)
calc_created = watcher ()
以及有关WMI事件的文档位于:
https://docs.microsoft.com/en-us/windows/win32/wmicoreprov/wmimonitorbrightnessevent
但是,仅timgolden网站上的第二个示例有效,该示例用于检测计算器是否已打开和关闭。
这里是一个可能有用的参考:https://www.autohotkey.com/boards/viewtopic.php?f=5&t=58914
请指导我改编代码以检测笔记本电脑上的亮度变化!最好的问候:-)顺便说一句,我使用的是Python 3和Windows 10
这是我运行的代码
import wmi
c = wmi.WMI()
power_watcher = c.Win32_WmiMonitorBrightnessEvent.watch_for()
print(power_watcher)
和错误
Traceback (most recent call last):
File "C:\Users\Arno\AppData\Local\Programs\Python\Python38\lib\site-packages\wmi.py", line 1145, in __getattr__
return self._cached_classes (attribute)
File "C:\Users\Arno\AppData\Local\Programs\Python\Python38\lib\site-packages\wmi.py", line 1156, in _cached_classes
self._classes_map[class_name] = _wmi_class (self, self._namespace.Get (class_name))
File "<COMObject winmgmts:>", line 2, in Get
File "C:\Users\Arno\AppData\Local\Programs\Python\Python38\lib\site-packages\win32com\client\dynamic.py", line 287, in _ApplyTypes_
result = self._oleobj_.InvokeTypes(*(dispid, LCID, wFlags, retType, argTypes) + args)
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, 'SWbemServicesEx', 'Not found ', None, 0, -2147217406), None)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "watcher4.py", line 3, in <module>
power_watcher = c.Win32_WmiMonitorBrightnessEvent.watch_for()
File "C:\Users\Arno\AppData\Local\Programs\Python\Python38\lib\site-packages\wmi.py", line 1147, in __getattr__
return getattr (self._namespace, attribute)
File "C:\Users\Arno\AppData\Local\Programs\Python\Python38\lib\site-packages\win32com\client\dynamic.py", line 527, in __getattr__
raise AttributeError("%s.%s" % (self._username_, attr))
AttributeError: winmgmts:.Win32_WmiMonitorBrightnessEvent
已解决]
import wmi
c = wmi.WMI(namespace='wmi')
print_job_watcher = c.WmiMonitorBrightnessEvent.watch_for (
notification_type="Modification",
delay_secs=1
)
event_happened = print_job_watcher ()
print(event_happened)