Python Forum

Greetings everyone,
I was developing a program to add Metadata to several PDF Files I have using PyPDF2, more specifically with the PdfFileMerger module. when I try to append the pdf file to the PdfFileMerger instance so I can add metadata and write to a new file, I got an error. Have a look at the code below :

from PyPDF2 import PdfFileMerger

pdffile = open('Weather2015-2016.pdf','rb')
pdfmerge = PdfFileMerger()
pdfmerge.append(pdffile) #Already tried to add additional parameters :( bookmark=None, pages=None, import_bookmarks=True) , still not working
pdfmerge.addMetadata({'/Title':'Weather Conditions'})
pdffilefinal = open('New_Weather_Conditions.pdf','wb')
pdfmerge.write(pdffilefinal)
pdffile.close()
pdffilefinal.close()

Here's the Traceback :

Error:
Traceback (most recent call last):
  File "PDF_Metadata_change.py", line 5, in <module>
    pdfmerge.append(pdffile)
  File "build/bdist.linux-i686/egg/PyPDF2/merger.py", line 203, in append
  File "build/bdist.linux-i686/egg/PyPDF2/merger.py", line 151, in merge
  File "build/bdist.linux-i686/egg/PyPDF2/pdf.py", line 1362, in getOutlines
  File "build/bdist.linux-i686/egg/PyPDF2/pdf.py", line 1444, in _buildOutline
  File "build/bdist.linux-i686/egg/PyPDF2/pdf.py", line 1425, in _buildDestination
  File "build/bdist.linux-i686/egg/PyPDF2/generic.py", line 1059, in __init__
ValueError: need more than 0 values to unpack

I'm using py2.7 on linux

Just found that the script is actually working with other PDF files, the problem was then in the PDF File, even so I do not understand why, because it has content on its pages and it's not corrupted.