Python introspection... 2005-06-13 - By Hans,Veenendaal,AMplus R&D,SOJ
Back
This works for me.
App = Application
for obj in App.Selection:
Test = obj.LocalProperties
LogMessage(str(obj) + " has " + str(Test.Count) + " local properties")
If this fails than you have things selected that are not SceneItem
derived objects...
LocalProperties only exist on SceneItem derived objects. Selecting a
polymsh or kine will crash with
the (<unknown>.localproperties) error.
You could check if the obj is derived from SceneItem, but I have no idea
on how to do that in python.
It should be possible to QueryInterface with the SceneItem IID
{31903CD0-EDFB-11 (See http://DFB-11.ora-code.com)D3-ACCC-0090275802 (See http://CCC-0090275802.ora-code.com)BF} through python win32com
support...
Maybe somebody else can fill in the blanks here.
In ATLCOM it is farely simple:
CComQIPtr<ISceneItem> pItem = pObj; // Get the ISceneItem interface
from the Object
if(pItem != NULL)
{
// We are dealing with a ISceneItem derived object.
}
Hans
>-- --Original Message-- --
>From: owner-xsi@(protected) [mailto:owner-xsi@(protected)]
>On Behalf Of Bernard Lebel
>Sent: Saturday, June 11, 2005 5:29 AM
>To: XSI@(protected)
>Subject: Re: Python introspection...
>
>Hello,
>
>Is there an easier way to check if an object has, for example,
>the "LocalProperties" attribute, other than by going through
>such a chunk of code?
>
>Right now I have this:
>
>xsi = Application
>
>oObject = xsi.selection(0)
>
># Iterate object attributes
>for i in xrange( 0, oObject._oleobj_.GetTypeInfoCount() ):
>
> typeInfo = xsi.selection(0)._oleobj_.GetTypeInfo( i )
> typeAttr = typeInfo.GetTypeAttr()
>
> # Iterate "functions" of object
> for iFunction in xrange( 0, typeAttr.cFuncs ):
>
> functionDescription = typeInfo.GetFuncDesc( iFunction )
>
> # Get name of function (even if function is
>actually a property)
> sName = typeInfo.GetNames(
>functionDescription.memid )[0]
>
> if sName == 'LocalProperties': xsi.logmessage( 'yeah!' )
>
>
>I have tried simpler approches, like
>
>if not oObject.localproperties: xsi.logmessage( 'no' )
>
>But I get an attribute error (<unknown>.localproperties).
>
>
>Thanks
>Bernard
>
>
>
>
>On 4/6/05, Jerry Gamache <jerryg@(protected)> wrote:
>> Once you know the function name, you sometimes want to get
>some very terse documentation:
>>
>> def FormatDocumentation(typeInfo, funDesc):
>> nameAndParms = typeInfo.GetNames(funDesc.memid)
>> docum = typeInfo.GetDocumentation(funDesc.memid)
>> import pythoncom
>> # This one differentiates between "functions" and "accessors"
>> if funDesc.invkind == pythoncom.INVOKE_FUNC:
>> docStr = nameAndParms[0] + "(" +
>",".join(nameAndParms[1:]) + ")\n"
>> else:
>> docStr = nameAndParms[0] + "\n"
>> if docum[1]:
>> docStr += "\t" + docum[1]
>> return docStr
>>
>> def GetDocumentation( dynDisp, funcName = None ):
>> allTypeInfoDoc = []
>> for iTI in xrange(0,dynDisp._oleobj_.GetTypeInfoCount()):
>> typeInfo = dynDisp._oleobj_.GetTypeInfo(iTI)
>> typeAttr = typeInfo.GetTypeAttr()
>> if funcName:
>> for iFun in xrange(0,typeAttr.cFuncs):
>> funDesc = typeInfo.GetFuncDesc(iFun)
>> name =
>typeInfo.GetNames(funDesc.memid)[0]
>> if name.upper() == funcName.upper():
>> return
>FormatDocumentation(typeInfo, funDesc)
>> else:
>> dict = {}
>> className =
>dynDisp._oleobj_.GetTypeInfo(0).GetDocumentation(-1)
>> classDoc = "class %s
>\n\t%s\n\n"%(className[0],className[1])
>> allFuncDoc = []
>> for iFun in xrange(0,typeAttr.cFuncs):
>> funDesc = typeInfo.GetFuncDesc(iFun)
>> name =
>typeInfo.GetNames(funDesc.memid)[0]
>> if not dict.has_key(name):
>> dict[name] = 1
>>
>allFuncDoc.append(FormatDocumentation(typeInfo, funDesc))
>> allFuncDoc.sort()
>> allTypeInfoDoc.append(classDoc +
>"\n".join(allFuncDoc))
>> if funcName:
>> return "Documentation not found for %s"%(funcName,)
>> else:
>> return "\n".join(allTypeInfoDoc)
>>
>> # 2 ways to call this one: without a function name it retrieves doc
>> for all functions
>> Application.LogMessage(GetDocumentation(Application))
>> # And with a name, it tries to find the doc for that function:
>> Application.LogMessage(GetDocumentation(Application, "StatusBar"))
>> Application.LogMessage(GetDocumentation(Application, "NotThere"))
>
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