A co-worker of mine is writing a tool to automate tasks in Photoshop, and found
a win32 error we can't explain. And possibly a bug.
The following script generates an error about how Select() can only take
one-dimensional arrays:
import win32com.client
ps_app = win32com.client.Dispatch('Photoshop.Application')
ps_app.Documents.Add(128, 128, 72)
# select a 10x10 square in the upper left corner of the document
sel_area = ((0, 0), (10, 0), (10, 10), (0, 10), (0, 0))
ps_app.ActiveDocument.Selection.Select(sel_area)
The error:
com_error: (-2147352567, 'Exception occurred.', (0, 'Adobe Photoshop', 'Illegal
argument - argument 1\n- Only arrays with dimension 1 are supported', None, 0,
-2147220262), None)
File "c:\Python_Scripts\COM\Photoshop\selectionTest.py", line 7, in <module>
ps_app.ActiveDocument.Selection.Select(sel_area)
File
"C:\Python25\Lib\site-packages\win32com\gen_py\E891EE9A-D0AE-4CB4-8871-F92C0109F18Ex0x9x0.py",
line 2606, in Select
, Type, Feather, AntiAlias)
The problem is that that method is documented as taking two dimensional arrays.
Here's an exerpt from the Photoshop CS3 VBScript Ref doc:
docH = appRef.ActiveDocument.Width / 2
docV = appRef.ActiveDocument.Height / 2
selRegion = Array( Array( topLeftH * docH, topLeftV * docV), _
Array( topLeftH * docH + docH, topLeftV * docV), _
Array( topLeftH * docH + docH, topLeftV * docV + docV), _
Array( topLeftH * docH, topLeftV * docV + docV), _
Array( topLeftH * docH, topLeftV * docV))
appRef.ActiveDocument.Selection.Select(selRegion)
It makes sense that it has to take a sequence of two-element sequences, right?
Oddly enough, if you run the above code using the comtypes extensions instead
of win32com, it works perfectly. The first two lines then become:
import comtypes.client
ps_app = comtypes.client.CreateObject('Photoshop.Application')
Any ideas why this throws an exception with win32com.client/Dispatch? Is this
a bug?
Thanks in advance.
- Adam
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