Jim Ragsdale wrote:
> I am trying to access the femap API, and having a bit of trouble. Here
> is a simple example:
>
> from win32com.client import Dispatch
> femap = Dispatch("femap.model")
> rc = femap.feAppGetActiveView(viewID)
>
> This method, according to the documentation, is supposed to return a
> long integer in viewID. If I do not define viewID, python returns the
> error:
>
> NameError: name 'viewID' is not defined
Right, because it's not. Python never passes variables by reference.
The language simply does not have that concept. When a COM method has
an output parameter, Pythoncom turns it into a true output parameter.
What you probably need is this:
viewID = femap.feAppGetActiveView()
> I ran makepy and it generates a file, but I don't know if it is using
> it or not.
The use of makepy is critical when the interface includes reference
parameters.
> In the file, I can find the definition for the method:
>
> def feAppGetActiveView(self, nViewID=pythoncom.Missing):
> return self._ApplyTypes_(20376, 1, (3, 0), ((16387, 2),),
> u'feAppGetActiveView', None,nViewID)
>
> To me it looks like win32 is not getting the information about the
> variable types from com.
Sure it is. The type code 16387 is VT_I4 + VT_BYREF, which means a
4-byte integer passed by reference.
--
Tim Roberts, [email protected]
Providenza & Boekelheide, Inc.
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