[python-win32] issues with win32com constants and static/dynamic dispatch

[Jason Ferrara]

I'm trying to use a COM library from python.

If I use dynamic dispatch, the com objects all behave correctly, but  
the constants defined in the COM library don't show up.

If I use static dispatch, the constants show up, but COM objects  
returned by calls into the COM library seem broken.

As example, starting with dynamic dispatch

   Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32  
bit (Intel)] on win32
   Type "help", "copyright", "credits" or "license" for more  
information.
   >>> import win32com.client
   >>> mi=win32com.client.Dispatch("MIDLIBCom.MIDLib")
   >>> cams=mi.OpenCameras("C:\Program Files\Micron Imaging 
\sensor_data")
   >>> c=cams[0]
   >>> print c
   <COMObject OpenCameras>
   >>> print c.productName
   Micron Imaging DEMO2

So far everything is fine, but now...

   >>> print win32com.client.constants.MI_BAYER_8
   Traceback (most recent call last):
     File "<stdin>", line 1, in <module>
     File "C:\Python25\Lib\site-packages\win32com\client 
\__init__.py", line 168, in
    __getattr__
       raise AttributeError, a
   AttributeError: MI_BAYER_8

This is no good. So now I try static dispatch

   Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32  
bit (Intel)] on win32
   Type "help", "copyright", "credits" or "license" for more  
information.
   >>> import win32com.client
   >>> mi=win32com.client.gencache.EnsureDispatch("MIDLIBCom.MIDLib")
   >>> print win32com.client.constants.MI_BAYER_8
   1

Things are looking better, but now...

   >>> cams=mi.OpenCameras("C:\Program Files\Micron Imaging 
\sensor_data")
   >>> c=cams[0]
   >>> print c
   <PyIUnknown at 0xac640c with obj at 0xf0d808>
   >>> print c.productName
   Traceback (most recent call last):
     File "<stdin>", line 1, in <module>
   AttributeError: 'PyIUnknown' object has no attribute 'productName'


So whats going on here? What am I doing wrong?

Thanks

- J





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