Mustafa Görmezer schrieb:
> Hello,
>
> I am automating a CAD System which expects a so called
> CATSafeArrayVariant. This is defined as one-dimensional arrays of
> CATVariants. When I am right, this should work now with comtypes. But
> how do I use it when a method expects it by reference ?
>
> In pure Python (where no "by reference" exists) I would simply use this
> to get a list of file names:
>
> myrefs = Send.GetListOfDependantFiles()
>
> In VB (which works) it looks like:
>
> Dim arrayOfVariantOfBSTR()
> ReDim arrayOfVariantOfBSTR(500)
> Call Send.GetListOfDependantFiles(arrayOfVariantOfBSTR)
>
> After this I can find the results in the arrayOfVariantOfBSTR, which can
> be used in a for each loop.
I looked into the generated file that you sent me offline. The
GetListOfDependantFiles()
method uses an [in, out] parameter, apparently a SAFEARRAY of BSTR (an array of
strings).
You must call the method with a list (or tuple) containing strings, comtypes
will
pack these automatically into a safearray, the com object will insert its
results
into the safearray, and comtypes will unpack it again and return a them as a
sequence.
So I assume that something like this *should* work:
result = send.GetListOfDependantFiles([None] * 500)
for item in result:
print item
Thomas
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