Converts .docx or .doc files to a PDF. With threading

word_to_pdf.py

import os
import pythoncom
# import comtypes.client
import win32com
import win32com.client as client
from shutil import copyfile, rmtree
import threading


wdFormatPDF = 17
files = ['list of paths']  # CHANGE THIS
pythoncom.CoInitialize()
word = client.Dispatch('Word.Application')
# word = comtypes.client.CreateObject('Word.Application')


def convert_to_pdf(in_file, word_id):
    pythoncom.CoInitialize()
    word = client.Dispatch(pythoncom.CoGetInterfaceAndReleaseStream(word_id, pythoncom.IID_IDispatch))
    
    word.Visible = False
    in_file = os.path.abspath(in_file)
    out_file = in_file.replace('.docx','.pdf').replace('.doc', '.pdf')
    doc = word.Documents.Open(in_file)
    doc.SaveAs(out_file, FileFormat=wdFormatPDF)
    doc.Close()  


threads = []
for file in notes:
    word_id = pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch, word)
    t = threading.Thread(target=convert_to_pdf, args=(file, word_id))
    t.start()
    threads.append(t)

print("Creating PDF's")
for t in threads: t.join()
word.Quit()
print("Created PDF's")