I have a question about RegistryValueChangeEvent that I have not been able
to find an answer to on the internet so far. I would appreciate any help
since I have already spent a lot of time finding any material that explains
this:
*What I am trying to do: *
- create an event when a value for a registry key changes
*How I am doing it: *
import wmi
import _winreg
c = wmi.WMI ()
raw_wql = "SELECT * FROM RegistryValueChangeEvent WHERE
Hive='HKEY_LOCAL_MACHINE' AND KeyPath='Software\\\\Temp' AND
ValueName='Name'"
watcher = c.watch_for(raw_wql=raw_wql,wmi_class = "__ExtrinsicEvent")
while True:
try:
process_created = watcher()
print 'value changed'
Event is caught perfectly but
*Problem: *
traceback (most recent call last):
File "MonitorRegistry.py", line 18, in <module>
process_created = watcher()
File "C:\Python27\lib\site-packages\wmi.py", line 1195, in __call__
handle_com_error ()
File "C:\Python27\lib\site-packages\wmi.py", line 241, in handle_com_error
raise klass (com_error=err)
_wmi: <x_wmi: Unexpected COM Error (-2147352567, 'Exception occurred.', (0,
u'SWbemPropertySet', u'Not found ', None, 0, -2147217406), None)>
*when I debugged, this is the module that throws the exception: *
*wmi.py [Line 1178-1195] *
def __call__ (self, timeout_ms=-1):
"""When called, return the instance which caused the event. Supports
timeout in milliseconds (defaulting to infinite). If the watcher
times out, :exc:`x_wmi_timed_out` is raised. This makes it easy to
support
watching for multiple objects.
"""
try:
event = self.wmi_event.NextEvent (timeout_ms)
if self.is_extrinsic:
return _wmi_event (event, None, self.fields)
else:
return _wmi_event (
*event.Properties_ ("TargetInstance").*Value,
_wmi_object (event, property_map=self._event_property_map),
self.fields
)
except pywintypes.com_error:
handle_com_error ()
*self.is_extrinsic returns false and
event.Properties_("TargetInstance").Value throws the exception*
Is there a way I can explicitly initialize the class _wmi_watcher and set
self.is_extrinsic = True?
Other information:
Running on Windows 8 64 Bit
>>> platform.machine()
'AMD64'
>>> platform.architecture()
('64bit', 'WindowsPE')
>>> platform.python_version()
'2.7.8'
>>> platform.python_implementation()
'CPython'
Using WMI-1.4.9.win32 - downloaded via PIP
pywin32-219.win-amd64-py2.7
Thanks
khyati
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