[python-win32] no array returned in output parameter

[Mark Hammond]

On 17/12/2008 12:30 AM, Roger Upole wrote:
> Enric Jaen wrote:
>>
>>
>> It's the library of the Xcalibur, a propietary program used in
>> proteomics. to read spectra. They provide an API, and VB examples to
>> access it.
>>
>> The problem is happening with those methods that return and array, as
>> the others work fine.
>>
>> I am using defaultNamedNotOptArg= pythoncom.Missing
>>
>> Is there something else I should check?
>>
>>
>
> Try using pythoncom.Empty instead of Missing. Missing can be interpreted
> as the end of
> the argument list, so the app sees no arguments at all.

It would be very interesting if that was the problem.  Empty makes most 
sense for "out" args, but it is impossible/pointless to have Empty 
specified after Missing - and many common objects work much better with 
Missing.  I wish I knew exactly what VB did (and I suppose some 
reverse-engineering could probably tell us), but that will need a 
round-tuit too...

Mark