Adobe Acrobat API in Python

Question

System:

Python 3.6
Windows 10

Goal:

Use the Adobe Acrobat API to use the "Save As" feature to save a pdf to jpegs.

Note: For my purposes I cannot use Wand or other packages.

Resources:

Adobe_API_Documentation

Implementation_Example 1

Error_Handling_Issue

VBA_Example

Current Code:

import winerror
import win32com
from win32com.client.dynamic import Dispatch, ERRORS_BAD_CONTEXT

ERRORS_BAD_CONTEXT.append(winerror.E_NOTIMPL)

my_dir = r"path\\to\\example\\"
my_pdf = "example.pdf"

os.chdir(my_dir)
src = os.path.abspath(my_pdf)

pdDoc = Dispatch("AcroExch.PDDoc")
pdDoc.Open(src)

jsObject = pdDoc.GetJSObject()

jsObject.SaveAs(os.path.abspath('./output_example.jpeg'), "com.adobe.acrobat.jpeg")

Issue:

jsObject is Null

Resulting in the following traceback:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-26-9c82c454eb2a> in <module>()
----> 1 jsObject.SaveAs(os.path.abspath('./output_example.jpeg'), "com.adobe.acrobat.jpeg")

AttributeError: 'NoneType' object has no attribute 'SaveAs'

Error Documentation Notes:

GetJSObject
Gets a dual interface to the JavaScript object associated with the PDDoc. This allows automation clients full access to both built-in and user-defined JavaScript methods available in the document. For more information on working with JavaScript, see Developing Applications Using Interapplication Communication.

Syntax
LDispatch* GetJSObject();

Returns
The interface to the JavaScript object if the call succeeded, NULL otherwise.

Answer 1

Consider interfacing with the AvDoc object as one of your links show its usage, and then build pdDoc and jsObject from it. Be sure to also wrap process in a try/except/finally block to effectively release COM objects regardless of error.

import os    
import winerror
from win32com.client.dynamic import Dispatch, ERRORS_BAD_CONTEXT

ERRORS_BAD_CONTEXT.append(winerror.E_NOTIMPL)

my_dir = r"C:\\path\\to\\example\\"
my_pdf = "example.pdf"

os.chdir(my_dir)
src = os.path.abspath(my_pdf)

try:
    AvDoc = Dispatch("AcroExch.AVDoc")    

    if AvDoc.Open(src, ""):            
        pdDoc = AvDoc.GetPDDoc()
        jsObject = pdDoc.GetJSObject()
        jsObject.SaveAs(os.path.join(my_dir, 'output_example.jpeg'), "com.adobe.acrobat.jpeg")

except Exception as e:
    print(str(e))

finally:        
    AvDoc.Close(True)

    jsObject = None
    pdDoc = None
    AvDoc = None