How to convert a .pptx to .pdf using Python

unoconv is a great tool to perform this task and it is indeed build in python.
Regarding your problem, it might be related to a recurring problem with the way the python interpreter is set in the main unoconv file after it has been installed.

To run it with python3 interpreter, replace #!/usr/bin/env python with #!/usr/bin/env python3 or #!/usr/bin/python3 in unoconv file (/usr/bin/unoconv).

one liner:

sudo sed -i -e '1s:#!/usr/bin/env python$:#!/usr/bin/env python3:' /usr/bin/unoconv

You could also symlink /usr/bin/unoconv to /usr/local/bin/unoconv.

I was working with this solution but I needed to search all .pptx, .ppt, and then turn them all to .pdf (python 3.7.5). Hope it works…

import os
import win32com.client

ppttoPDF = 32

for root, dirs, files in os.walk(r'your directory here'):
    for f in files:

        if f.endswith(".pptx"):
            try:
                print(f)
                in_file=os.path.join(root,f)
                powerpoint = win32com.client.Dispatch("Powerpoint.Application")
                deck = powerpoint.Presentations.Open(in_file)
                deck.SaveAs(os.path.join(root,f[:-5]), ppttoPDF) # formatType = 32 for ppt to pdf
                deck.Close()
                powerpoint.Quit()
                print('done')
                os.remove(os.path.join(root,f))
                pass
            except:
                print('could not open')
                # os.remove(os.path.join(root,f))
        elif f.endswith(".ppt"):
            try:
                print(f)
                in_file=os.path.join(root,f)
                powerpoint = win32com.client.Dispatch("Powerpoint.Application")
                deck = powerpoint.Presentations.Open(in_file)
                deck.SaveAs(os.path.join(root,f[:-4]), ppttoPDF) # formatType = 32 for ppt to pdf
                deck.Close()
                powerpoint.Quit()
                print('done')
                os.remove(os.path.join(root,f))
                pass
            except:
                print('could not open')
                # os.remove(os.path.join(root,f))
        else:
            pass

The try and except was for those documents I couldn’t read and won’t exit the code until the last document. And I would recommend doing each type of format aside: first .pptx and then .ppt (or viceversa).

I believe the answer has to be updated because because comtypes doesn’t work anymore.

So this is the code which works (updated version of the accepted answer) :

import win32com.client

def PPTtoPDF(inputFileName, outputFileName, formatType = 32):
    powerpoint = win32com.client.DispatchEx("Powerpoint.Application")
    powerpoint.Visible = 1

    if outputFileName[-3:] != 'pdf':
        outputFileName = outputFileName + ".pdf"
    deck = powerpoint.Presentations.Open(inputFileName)
    deck.SaveAs(outputFileName, formatType) # formatType = 32 for ppt to pdf
    deck.Close()
    powerpoint.Quit()

Have a look at the following snippet. It uses unoconv and it’s working ex expected on UBUNTU 20.04.

# requirements
# sudo apt install unoconv
# pip install tqdm
# pip install glob
import glob
import tqdm
path = "<INPUT FOLDER>"
extension = "pptx"
files = [f for f in glob.glob(path + "/**/*.{}".format(extension), recursive=True)]
for f in tqdm.tqdm(files):
    command = "unoconv -f pdf "{}"".format(f)
    os.system(command)

This snippet can be used for different-2 format conversion.

Original Snippet

I need a way to save PPTX file to PDF and PDF with notes. Here is my solution

from comtypes.client import CreateObject, Constants

def PPTtoPDF(inputFileName, outputFileName, formatType = 32):
    powerpoint = CreateObject('Powerpoint.Application')
    constants = Constants(powerpoint)
    powerpoint.Visible = 1

    if outputFileName[-3:] != 'pdf':
        outputFileName = outputFileName + ".pdf"
    deck = powerpoint.Presentations.Open(inputFileName)
    deck.SaveAs(outputFileName, constants.PpSaveAsPDF)
    deck.Close()
    powerpoint.Quit()


def PPTtoPDFNote(inputFileName, outputFileName, formatType = 32):
    powerpoint = CreateObject('Powerpoint.Application')
    constants = Constants(powerpoint)
    powerpoint.Visible = 1

    if outputFileName[-3:] != 'pdf':
        outputFileName = outputFileName + ".pdf"
    deck = powerpoint.Presentations.Open(inputFileName)
    deck.ExportAsFixedFormat(
        outputFileName,
        constants.ppFixedFormatTypePDF,
        constants.ppFixedFormatIntentPrint,
        False, # No frame
        constants.ppPrintHandoutHorizontalFirst,
        constants.ppPrintOutputNotesPages,
        constants.ppPrintAll
    )
    deck.Close()
    powerpoint.Quit()

To use it,

PPTtoPDF    ('.\Test.pptx', '.Test.pdf'          )
PPTtoPDFNote('.\Test.pptx', '.Test_with_Note.pdf')

Note: It is always the best to do it using Windows platform, i.e., using comtypes so that it could always support new format and features in Microsoft Powerpoint.

For converting .pptx/.docx to pdf on google cloud function, I referred to this github repo https://github.com/zdenulo/gcp-docx2pdf/tree/master/cloud_function, they are using google drive api’s.
In this repo they have used mime type of docx to convert .docx file to .pdf file over google drive, you can use other mime types as well, like mime type of pptx(referring: https://developers.google.com/drive/api/v3/mime-types) to convert files over google drive.
Rest all code is same as mentioned in the github repo.

try this code it works with me

import os
import win32com.client as win32
import comtypes

#make sure to initial cometypes
comtypes.CoInitialize()


# Path to input PowerPoint document
input_path = 'path/to/input/document.pptx'

# Path to output PDF file
output_path = 'path/to/output/document.pdf'

# Open PowerPoint document and convert to PDF
powerpoint = win32.Dispatch('Powerpoint.Application')
presentation = powerpoint.Presentations.Open(input_path)
presentation.SaveAs(output_path , 32)
presentation.Close()
powerpoint.Quit()