[python-win32] Trying to get the Win32_PortableBattery and Win32_SystemEnclosure classes to work

[Tim Golden]

On 08/03/2010 02:38, python at bdurham.com wrote:
> I'm trying to get the Win32_PortableBattery and
> Win32_SystemEnclosure classes to work.
>
> Oddly enough, both classes return empty results on my laptop. I'm
> wondering if I'm using the WMI interface correctly or if I need
> to be more explict in the arguments I pass to each class's
> __init__?

It looks like you're a little bit confused as to what's
going on here. (Or maybe I am :) ).

>>>> import wmi
>>>> c = wmi.WMI().Win32_SystemEnclosure
>>>> c
> <_wmi_class: \\SONYLAPTOP-01\ROOT\cimv2:Win32_SystemEnclosure>

Although you *can*, you won't normally use the class
as an object in its own right. But maybe you were just
checking that you'd got the right thing.

>
>>>> c()
> [<_wmi_object:
> \\SONYLAPTOP-01\root\cimv2:Win32_SystemEnclosure.Tag="System
> Enclosure 0">]

OK. So you've got a list (of length one) which is a Win32_SystemEnclosure
instance.

>
>>>> c()[0]
> <_wmi_object:
> \\SONYLAPTOP-01\root\cimv2:Win32_SystemEnclosure.Tag="System
> Enclosure 0">

And the first item is indeed the System Enclosure

>>>> c()[0].properties
> {u'HotSwappable': None, u'SKU': None, u'SerialNumber': None,
> u'Width': None, u'SecurityBreach': None, u'Removable': None,
> u'PartNumber': None, u'AudibleAlarm': None, u'Status': None,
> u'TypeDescriptions': None, u'Description': None,
> u'NumberOfPowerCords': None, u'Replaceable': None,
> u'LockPresent': None, u'SecurityStatus': None,
> u'BreachDescription': None, u'Manufacturer': None,
> u'OtherIdentifyingInfo': None, u'Version': None, u'Name': None,
> u'InstallDate': None, u'ServiceDescriptions': None,
> u'VisibleAlarm': None, u'PoweredOn': None, u'ServicePhilosophy':
> None, u'SMBIOSAssetTag': None, u'Caption': None, u'Depth': None,
> u'Model': None, u'HeatGeneration': None, u'Weight': None,
> u'ChassisTypes': None, u'Height': None, u'Tag': None,
> u'CableManagementStrategy': None, u'CreationClassName': None,
> u'CurrentRequiredOrProduced': None}

OK. Now you're looking at the behind-the-scenes properties
cache. Which doesn't have anything in it yet because you
haven't requested any properties. Try this instead:

<code>
import wmi

c = wmi.WMI ()
for enclosure in c.Win32_SystemEnclosure ():
   print enclosure

   # or print enclosure.SerialNumber, enclosure.ChassisTypes

</code>

Do you still get no values? And likewise for the battery class..

TJG