The code below works great on what I'm trying to initially accomplish. However, if I try to manually add a new first page and bookmark to that PDF the existing bookmark destinations move back one page and are not linked to where they originally merged.
Any suggestions? Is there a way to lock bookmark destinations during the merge?
import os
from PyPDF2 import PdfFileMerger
...
for pdf in PDFfiles: # Merge each PDF into a single PDF and add Bookmarks
name = os.path.splitext(os.path.basename(pdf))[0] # Split filename from .pdf extension
dp = name.index("$") + 1 # Find position of $ sign
bookmarkname = name[dp:].replace("_", " ") # set bookmark name & replace underscores with spaces
merger.append(open(os.path.join(cdir,pdf), 'rb'), bookmark=bookmarkname) # Add next PDF to the end of the previous & add bookmark name
merger.setPageMode("/UseOutlines") # Show Bookmarks on open
merger.write(open(os.path.join(odir,newname), 'wb'))
