Python and Javascript equivalence

[Sam the Cat]

Hey All,

I am writing some COM code in Python to control photoshop. Several
functions of PS require an "Array" argument. In the examples of VBscript or
javascript the Array type is used. I have tried what would appear to be the
equivalent in Python -- Lists and Tuples -- but to no avail. Anyone have
any insight on what via the COM interface is equivalent to an Array in
javascript ?

Cheers
Sam

[Prateek]

Try creating a dict with sequential numeric keys.

If you already have a list called my_list, you can do:

com_array = dict(zip(range(len(my_list)), my_list))

This works when you want to convert Python objects to Javascript using
JSON. It may work for you.

-Prateek

[7stud]

On Apr 22, 7:00 pm, "Sam the Cat" <[e-mail]:

Hey All,

I am writing some COM code in Python to control photoshop. Several
functions of PS require an "Array" argument. In the examples of VBscript or
javascript the Array type is used. I have tried what would appear to be the
equivalent in Python -- Lists and Tuples -- but to no avail. Anyone have
any insight on what via the COM interface is equivalent to an Array in
javascript ?

Cheers
Sam

See if the python array type works:

import array

y = array.array("i", [2,3,4])
print y

[Marc 'BlackJack' Rintsch]

In <11**********************@n59g2000hsh.googlegroups .com>, Prateek wrote:

Try creating a dict with sequential numeric keys.

If you already have a list called my_list, you can do:

com_array = dict(zip(range(len(my_list)), my_list))

com_array = dict(enumerate(my_list))

That doesn't create the intermediate lists.

Ciao,
Marc 'BlackJack' Rintsch

[Steve Holden]

Sam the Cat wrote:

Hey All,

I am writing some COM code in Python to control photoshop. Several
functions of PS require an "Array" argument. In the examples of VBscript or
javascript the Array type is used. I have tried what would appear to be the
equivalent in Python -- Lists and Tuples -- but to no avail. Anyone have
any insight on what via the COM interface is equivalent to an Array in
javascript ?

The nest way to approach an answer to your question would be for you to
post a VB snippet from one of the examples together with your attempt to
do the same thing in Python plus the error traceback (or other such
messages as you may see) generated when your attempts fails.

Otherwise the question is just a bit too broad to give an answer.

regards
Steve
--
Steve Holden [phone] [phone]
Holden Web LLC/Ltd http://www.holdenweb.com
Skype: holdenweb http://del.icio.us/steve.holden
Recent Ramblings http://holdenweb.blogspot.com

[Sam the Cat]

>>

>I am writing some COM code in Python to control photoshop. Several
functions of PS require an "Array" argument. In the examples of VBscript
or javascript the Array type is used. I have tried what would appear to
be the equivalent in Python -- Lists and Tuples -- but to no avail.
Anyone have any insight on what via the COM interface is equivalent to
an Array in javascript ?

The nest way to approach an answer to your question would be for you to
post a VB snippet from one of the examples together with your attempt to
do the same thing in Python plus the error traceback (or other such
messages as you may see) generated when your attempts fails.

Otherwise the question is just a bit too broad to give an answer.

regards
Steve
--

Here is the Javascript example code

......
selRegion = Array(Array(1,1),Array(1,2),Array(2,2),Array(2,1))
Doc.Selection.Select(selRegion,1,0,0)
......

Here is my interpretation in Python

........
selregion = [(1,1),(1,2),(2,2),(2,1)]
print selregion
doc.Selection.Select(selregion,1,0,0)
.......

Here is the error code generated

...........
F:\automation>test2.py
[(1, 1), (1, 2), (2, 2), (2, 1)]
Traceback (most recent call last):
File "F:\automation\test2.py", line 19, in ?
doc.Selection.Select(selregion,1,0,0)
File "<COMObject <unknown>>", line 3, in Select
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, 'Adobe
Photoshop', 'Illegal argument - argument 1\n- Only arrays with dimension 1
are supported', None, 0, -2147220262), None)
.............