Multiple DocumentInfo keys

thanks! this is great, i had trouble opening some pdfs but this fixed the issue.

had to do a new install today, and used a different workaround. I think it's a slight improvement:
around line 532:

if not data.get(key):
    data[key] = value

was:
if data.has_key(key):
    raise utils.PdfReadError, "multiple definitions in dictionary"
data[key] = value

just fyi,
--Tim Arnold

PDF Shuffler for Ubuntu 13.04 presented same error message. The posted solution by Tim Arnold worked perfectly. Thanks.

[code]if data.has_key(key):
    raise utils.PdfReadError, "multiple definitions in dictionary"
data[key] = value[/code]

was changed to

[code]if not data.get(key):
    data[key] = value[/code]

PDFShuffler 0.6.0 for Ubuntu 15.10 presented the same error message.
The solution posted by Tim Arnold #2 worked perfectly. Thanks

Just for information, the code to be changed currently begins on line 523 of the file:
 /usr/lib/python2.7/dist-packages/pyPdf/generic.py

I'm having this same issue in Ubuntu 16.04; I'm trying to merge 3 1-page-pdf-files, and PDFsuffler alerts this dialog upon saving:

"multiple definitions in dictionary"

After this, the output-pdf-file shows a blank page.

The workaround I did, was printed the PDF files to PDF (again) using Ubuntu 16.04's default PDF viewer, and then I was able to merge these 3 PDFs.

The PDFs were originally gmails that I printed using Chromium's print to PDF feature. Printing them to PDF again using a different too seems to clean out what ever was corrupting this the first try to merge them.