Export a set of PPTX files as a single PDF

export_pdfs_from_pptx.py

import os
import datetime
import comtypes.client
from PyPDF2 import PdfFileMerger

target_dir = os.path.abspath(os.path.join(
    os.path.dirname(os.path.realpath(__file__)),
    os.pardir,
    "data transfer"
))

print("Export to: " + target_dir)

date_prefix = datetime.datetime.now().date().isoformat() 

sources = []
intermediate_pdf_names = []
themenbloecke_dir = os.path.dirname(os.path.realpath(__file__))
for folder in os.listdir(themenbloecke_dir):
    if not os.path.isdir(folder):
        continue
    if folder.startswith("_") or folder.startswith("00"):  # adjust rules as you wish
        continue
    for praesi_file in os.listdir(os.path.join(themenbloecke_dir, folder)):
        if not praesi_file.endswith(".pptx"):
            continue
        sources.append(
            os.path.abspath(os.path.join(
                themenbloecke_dir,
                folder,
                praesi_file
            )
        ))
        intermediate_pdf_names.append(
            os.path.abspath(os.path.join(
                themenbloecke_dir,
                folder,
                date_prefix + "_" + praesi_file[:-5] + ".pdf"
            )
        ))

print("Sources: ")
for i, source_file in enumerate(sources):
    print(f"{i+1}) {source_file}")
print("Intermediate PDFs: ")
for i, intermediate_pdf_name in enumerate(intermediate_pdf_names):
    print(f"{i+1}) {intermediate_pdf_name}")

powerpoint = comtypes.client.CreateObject("Powerpoint.Application")
for source, output in zip(sources, intermediate_pdf_names):
    if os.path.isfile(output):
        do_overwrite = input(f"Overwrite '{output}'? [n]/y ")
        if do_overwrite != "y":
            continue
    deck = powerpoint.Presentations.Open(source)
    deck.SaveAs(output, 32) # formatType = 32 for pptx to pdf
    deck.Close()
powerpoint.Quit()

for intermediate_pdf in intermediate_pdf_names:
    if not os.path.isfile(intermediate_pdf):
        raise Exception(f"Missing file: {intermediate_pdf}")
    print("PDF exists: " + intermediate_pdf)


merger = PdfFileMerger()
for pdf in intermediate_pdf_names:
    merger.append(pdf)

time_information = input("Semester: ")
export_file_name = f"My Course - {time_information}.pdf"

path_to_export_file = os.path.join(
    target_dir,
    export_file_name
)
merger.write(path_to_export_file)
merger.close()

print(f"Created: {path_to_export_file}")