[python-win32] Passing Arrays by Reference

Wed, 06 Nov 2002 15:03:37 -0600

This is a cryptographically signed message in MIME format.

--------------ms040203090507080900080005
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Things seem to work fine for me. I created a test ActiveX DLL in VB with 
a single object. Here's the code for it:

Public Sub DoArrayThing(larr() As Long)
  Dim i As Long
  For i = LBound(larr) To UBound(larr)
    larr(i) = larr(i) + 1
  Next i

End Sub

Then in python here's what I get:

ActivePython 2.2.1 Build 222 (ActiveState Corp.) based on
Python 2.2.1 (#34, Apr 15 2002, 09:51:39) [MSC 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> from win32com.client import Dispatch
 >>> o = Dispatch('TestArray.ArrManip')
 >>> o.DoArrayThing(range(0, 4))
(1, 2, 3, 4)
 >>> a = _
 >>> o.DoArrayThing(a)
(2, 3, 4, 5)
 >>>

So it looks like everything python is doing is all fine and good with 
the arrays.

Erignac, Charles A wrote:

>I am calling a method on a COM object that fills in an array passed by
>reference. The array must be initialized to a given size otherwise the call
>will fail. Currently I am able to complete the call and the array returned
>by the method is the one I passed as a parameter but unfortunately the value
>of the array does not change and it should. For your information the COM
>object I work with is a Position interface maintained by the CATIA COM
>server. The method is Sub GetComponents(CATSafeArrayVariant array). I
>understand that the CATSafeArrayVariant type is equivalent to an array of
>variants.
>The python call looks like this:
>	a = range(0,12)
>	b = myPosition.GetComponents(a)
>	print a # outputs (0,1,2,3,4,5,6,7,8,9,10,11) instead of the actual
>components
>	print b # same output
>
>The call is an early binding thanks to pygen.
>I would appreciate any help regarding this problem. I would like at least to
>know where to look in the win32com code to understand what is going wrong.
>Best regards,
>
>Charles
>
>
>_______________________________________________
>Python-win32 mailing list
>Python-win32@python.org
>http://mail.python.org/mailman/listinfo/python-win32
>  
>

-- 
Jens B. Jorgensen
jens.jorgensen@tallan.com

"With a focused commitment to our clients and our people, we deliver value through customized technology solutions"  

--------------ms040203090507080900080005
Content-Type: application/x-pkcs7-signature; name="smime.p7s"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7s"
Content-Description: S/MIME Cryptographic Signature
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--------------ms040203090507080900080005--