accessing an OLE Automation (IDispatch) server from python which requires the use of "out params"

Mark Hammond skippy.hammond at
Tue Dec 11 02:16:43 CET 2012

On 11/12/2012 8:39 AM, bitbucket wrote:
> On Monday, December 10, 2012 3:58:33 PM UTC-5, Terry Reedy wrote:
>> I believe the easiest way to do that is to install the pywin
>> extensions
>> I assume it can handle out params.
> That definitely looks like a good starting point.  Just hoping
> someone knows whether or not it'll support the out params before I
> spend too much time digging into it.

"out" params are best supported if the object supplied a typelib - then 
Python knows the params are out and does the right thing automagically. 
  If out params are detected, the result of the function will be a tuple 
of (real_result, out_param1, ...)

Even if no typelib is supported, you can access them with a little pain 
via the win32com.client.Dispatch() object.  You might like to follow up 
to the python-win32 at mailing list where many people will be 
able to help.



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