Photoshop + Python problem

haiddasalami

Cross posting from tech-artists in hopes of getting something so I can start working on this Anywho, following Adam's blog post (http://techarttiki.blogspot.com/2008/08/photoshop-scripting-with-python.html) about COM and python and for some reason the code breaks at the open stage. Here's the code:

import win32com.client  
psApp = win32com.client.Dispatch("Photoshop.Application") 
psApp.Open(r"C:\test.jpg")       
doc = psApp.Application.ActiveDocument  
layer = doc.ArtLayers[0]               
layer.AdjustBrightnessContrast(20,-15)   
doc.Save()

pretty much a copy and paste and I get this as an error

Traceback (most recent call last):
File "C:\Users\Alistair Braz\workspace\Test\test.py", line 3, in <module>
psApp.Open(r"C:\test.jpg")
File "C:\Python26\lib\site-packages\win32com\client\dynamic.py", line 505, in __getattr__
ret = self._oleobj_.Invoke(retEntry.dispid,0,invoke_type,1)
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, u'Adobe Photoshop', u'Illegal argument - argument 1\n- Required value is missing', None, 0, -2147220262), None)

Any ideas? I thought it was 2.7 been weird so moved to 2.6 and still nothing. Installed 2.6 pywin and getting same thing. Photoshop is 64bit and I installed the 64bit version of pywin too.

haiddasalami

bump?

Ben Apuna

Hmm...

I just ran this:

import win32com.client psApp = win32com.client.Dispatch("Photoshop.Application")
 psApp.Open(r"G:\test.psd")         # Opens a PSD file
 doc = psApp.Application.ActiveDocument  # Get active document object
 layer = doc.ArtLayers[0]                # Get the bottom-most layer
 layer.AdjustBrightnessContrast(20,-15)  # Bright +20, Contrast -15
 doc.Save()

And it worked! Sweet!

The psd already existed before running the script.

I'm using Photoshop CS2, 32bit Python 2.6.6, and pywin32-216.win32-py2.6.exe from here.

I ran the script from within my IDE (spyder).

Good luck, and thanks for getting me off my ass to actually try this. I always wondered if it would work.

EDIT:

I just checked to make sure that script works on it's own without spyder, and it does, so that's not what's causing your problem.

It looks like a read error to me, but I'm just guessing. Does the file you are trying to open exist already? and do you have read/write permissions on that drive?

EDIT2:

Just tested with a JPG, that worked too, so that's not it either.

EDIT3:

Yup tested with the file missing and got this:

Traceback (most recent call last):
  File "G:\testPsOpen.py", line 10, in <module>
    psApp.Open(r"G:\test.jpg")         # Opens a PSD file
  File "<COMObject Photoshop.Application>", line 3, in Open
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, u'Adobe Photoshop', u'Illegal argument - argument 1\n- Expected a reference to an existing File/Folder', None, 0, -2147220262), None)

So that might possibly be your problem, maybe...

The file definitely needs to exist before you run the script.

Good luck

Damn! now I don't want to sleep, PS + Python, Yay!

iconoplast

You should also try using 32-bit python instead of the 64-bit -- you only need 64-bit python if you need access to the extra memory, and I don't think win32com plays nice with the win64 python build. (That is also the other difference between what you did and what Ben did.)

haiddasalami

Well Ill be damned. It was UAC. just got it open! Thanks so much Ben and icono

@Ben: Python and Photoshop is gonna be so much win